🕵️ Miami International Holdings, Inc. ($MIAX)
SEC insider & ownership activity, last 12 months · CIK 1438472 · every row links its SEC filing
Over the last 12 months insiders sold $74.4M against $2.0M of open-market buying. Thomas P. Gallagher sold $32.3M through a 10b5-1 trading plan in 12 lots (Apr–Sep). 1 planned sale is pending, the largest $838K (Shelly Brown). No red-flag 8-Ks in the window.
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
1 buyer, $2.0M (6 lots) · 11 sellers, $74.4M (64 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Thomas P. Gallagher | 0 | – | 12 | $32.3M | Sep 3, 2026 |
| Douglas M. Schafer Jr. | 0 | – | 6 | $12.3M | Sep 2, 2026 |
| Barbara J. Comly | 0 | – | 7 | $10.0M | Sep 2, 2026 |
| Shelly Brown | 0 | – | 8 | $4.2M | Jul 6, 2026 |
| Stahl Murray | 6 | $2.0M | 1 | $2.2M | Mar 5, 2026 |
| Emmons Lance | 0 | – | 2 | $3.5M | Aug 17, 2026 |
| Deitzel Edward | 0 | – | 8 | $2.9M | Sep 3, 2026 |
| Harish Jayabalan | 0 | – | 4 | $2.6M | Aug 4, 2026 |
| Kurt M. Eckert | 0 | – | 5 | $2.2M | Aug 4, 2026 |
| Cynthia Schwarzkopf | 0 | – | 3 | $1.2M | Aug 17, 2026 |
| Teekell Judson Gray | 0 | – | 8 | $1.0M | Sep 2, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Horizon Kinetics Asset Management LLC | 7.8% | 13D | May 19, 2026 | filing ↗ | |
| Horizon Kinetics Holding Corp | 7.8% | 13D | May 19, 2026 | filing ↗ | |
| T. ROWE Price Investment Management, Inc. | 5.3% | 13G | Aug 14, 2026 | filing ↗ | |
| BlackRock, Inc. | 5.1% | 13G | Jul 29, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Shelly Brown | $838K | Sep 16, 2026 | filing ↗ |
| Gallagher Investments LLC | $5.7M | Sep 3, 2026 | filing ↗ |
| Gallagher Investments LLC | $6.3M | Aug 19, 2026 | filing ↗ |
| Lance Emmons | $1.5M | Aug 17, 2026 | filing ↗ |
| Gallagher Investments LLC | $2.3M | Aug 4, 2026 | filing ↗ |
| J. Gray Teekell | $281K | Aug 4, 2026 | filing ↗ |
| Harish Jayabalan | $3.0M | Aug 4, 2026 | filing ↗ |
| Barbara J. Comly | $8.5M | Aug 4, 2026 | filing ↗ |
| Edward Deitzel | $2.1M | Aug 4, 2026 | filing ↗ |
| Cynthia Schwarzkopf | $620K | Jul 15, 2026 | filing ↗ |
| Harish Jayabalan | $817K | Jul 6, 2026 | filing ↗ |
| Shelly Brown | $653K | Jul 6, 2026 | filing ↗ |
| Douglas M. Schafer Jr. | $5.6M | Jul 2, 2026 | filing ↗ |
| Kurt M. Eckert | $247K | Jul 2, 2026 | filing ↗ |
| Shelly Brown | $204K | Jun 15, 2026 | filing ↗ |
| Cynthia Schwarzkopf | $795K | Jun 11, 2026 | filing ↗ |
| Harish Jayabalan | $784K | Jun 8, 2026 | filing ↗ |
| Lance Emmons | $1.9M | May 15, 2026 | filing ↗ |
| J. Gray Teekell | $425K | May 4, 2026 | filing ↗ |
| Shelly Brown | $1.5M | May 4, 2026 | filing ↗ |
| Edward Deitzel | $1.6M | May 4, 2026 | filing ↗ |
| Barbara J. Comly | $6.1M | Apr 15, 2026 | filing ↗ |
| Gallagher Investments LLC | $19.5M | Apr 15, 2026 | filing ↗ |
| Thomas P. Gallagher | $2.1M | Apr 15, 2026 | filing ↗ |
| Edward Deitzel | $514K | Apr 7, 2026 | filing ↗ |
| Shelly Brown | $722K | Apr 7, 2026 | filing ↗ |
| Shelly Brown | $95K | Apr 6, 2026 | filing ↗ |
| J. Gray Teekell | $118K | Mar 25, 2026 | filing ↗ |
| Shelly Brown | $1.0M | Mar 23, 2026 | filing ↗ |
| Kurt M. Eckert | $1.9M | Mar 19, 2026 | filing ↗ |
| Douglas M. Schafer Jr. | $5.7M | Mar 17, 2026 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Earnings (2.02) | Aug 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 5, 2026 | filing ↗ |
| Other events (8.01) | Jul 20, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Jun 17, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jun 16, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jun 15, 2026 | filing ↗ |
| Earnings (2.02) | May 6, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 6, 2026 | filing ↗ |
| Officer/director changes (5.02) | Apr 23, 2026 | filing ↗ |
| Officer/director changes (5.02) | Apr 7, 2026 | filing ↗ |
| Officer/director changes (5.02) | Mar 24, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Feb 25, 2026 | filing ↗ |
| Earnings (2.02) | Feb 25, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 25, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Feb 18, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Feb 9, 2026 | filing ↗ |
| Other events (8.01) | Jan 20, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 20, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Dec 15, 2025 | filing ↗ |
| Other events (8.01) | Dec 15, 2025 | filing ↗ |
| Other events (8.01) | Nov 25, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 25, 2025 | filing ↗ |
| Earnings (2.02) | Nov 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 5, 2025 | filing ↗ |
| Officer/director changes (5.02) | Oct 3, 2025 | filing ↗ |