MIAX insider buying – Miami International Holdings, Inc.
10 insider purchases since 2016 worth $2.7M by 8 different insiders. Last 12 months: 3 purchases, $722,511. Most recent filing: 2026-03-06.
Same time range as the chart above - each mark sits under the week of the trade. Circles = purchases (height = price paid, size = amount), red triangles = open-market sales of $50k+. Prices as reported, not adjusted for later stock splits.
Purchases are open-market buys (SEC Form 4, code "P") - insiders paying with their own money. Sales are open-market sales (code "S") of $50,000 or more; many sales are pre-planned (Rule 10b5-1) or made for taxes and diversification. Each row links to the original filing.
Bought, sold, still holding?
| Insider | Bought | First / last buy | Sold since 2016 | Holds now* | Status |
|---|---|---|---|---|---|
| HORIZON KINETICS ASSET MANAGEMENT LLC Director | $1.6M 2× · 41,670 sh | 2025-08-28 2026-03-04 | 1× · $5.0M last 2026-03-02 | 2,170,898 shares as of 2026-05-21 | Holds (sold earlier) |
| STAHL MURRAY Director | $410,175 2× · 9,639 sh | 2025-12-12 2026-03-05 | – | 4,581,654 shares as of 2026-03-06 | Holds - never sold |
| Gallagher Thomas P. CEO | $276,000 1× · 12,000 sh | 2025-08-13 2025-08-13 | 9× · $32.3M last 2026-09-03 | 2,209,817 shares as of 2026-09-04 | Sold part |
| Massad Mark I. Director | $184,000 1× · 8,000 sh | 2025-08-13 2025-08-13 | – | 10,737 shares as of 2026-06-17 | Holds - never sold |
| Moore Lisa Director | $126,500 1× · 5,500 sh | 2025-08-13 2025-08-13 | – | 12,737 shares as of 2026-06-17 | Holds - never sold |
| Smollen John Officer | $115,000 1× · 5,000 sh | 2025-08-13 2025-08-13 | – | 178,212 shares as of 2026-06-18 | Holds - never sold |
| Nazarali Jamil Director | $57,500 1× · 2,500 sh | 2025-08-13 2025-08-13 | – | 2,500 shares as of 2025-08-15 | Holds - never sold |
| Lozier Kenneth W. Director | $23,000 1× · 1,000 sh | 2025-08-13 2025-08-13 | – | 3,267 shares as of 2026-06-17 | Holds - never sold |
* Shares held after the insider's most recent SEC filing for this company (all share classes, direct and indirect). If an insider stops filing, later changes are not known.
Insider buying and selling by year
| Year | Purchases | Bought | Buyers | Sales | Sold |
|---|---|---|---|---|---|
| 2026 | 2 | $622,512 | 2 | 55 | $77.9M |
| 2025 | 8 | $2.1M | 8 | – | – |
Insider purchases
| Filed | Insider | Role | Shares | Avg price | Value | Holdings | Filing |
|---|---|---|---|---|---|---|---|
| 2026-03-06 | STAHL MURRAY | Director | 7,200 | $43.08 | $310,176 | +0.2% | SEC |
| 2026-03-05 | HORIZON KINETICS ASSET MANAGEMENT LLC | Director | 7,200 | $43.38 | $312,336 | +0.2% | SEC |
| 2025-12-15 | STAHL MURRAY | Director | 2,439 | $41.00 | $99,999 | +0.1% | SEC |
| 2025-09-30 | HORIZON KINETICS ASSET MANAGEMENT LLC | Director | 34,470 | $36.10 | $1.2M | +0.8% | SEC |
| 2025-08-15 | Smollen John | Officer | 5,000 | $23.00 | $115,000 | +224.6% | SEC |
| 2025-08-15 | Nazarali Jamil | Director | 2,500 | $23.00 | $57,500 | SEC | |
| 2025-08-15 | Moore Lisa | Director | 5,500 | $23.00 | $126,500 | SEC | |
| 2025-08-15 | Massad Mark I. | Director | 8,000 | $23.00 | $184,000 | SEC | |
| 2025-08-15 | Lozier Kenneth W. | Director | 1,000 | $23.00 | $23,000 | SEC | |
| 2025-08-15 | Gallagher Thomas P. | CEO | 12,000 | $23.00 | $276,000 | SEC |
Insider sales
| Filed | Insider | Role | Shares | Avg price | Value | Type | Filing |
|---|---|---|---|---|---|---|---|
| 2026-09-17 | Brown Shelly | Officer | 21,217 | $38.61 | $819,188 | Pre-planned (10b5-1) | SEC |
| 2026-09-04 | Gallagher Thomas P. | CEO | 47,000 | $42.43 | $2.0M | Pre-planned (10b5-1) | SEC |
| 2026-09-04 | Deitzel Edward | Officer | 11,000 | $42.21 | $464,310 | Pre-planned (10b5-1) | SEC |
| 2026-09-04 | Teekell Judson Gray | Director | 8,545 | $41.34 | $353,231 | Pre-planned (10b5-1) | SEC |
| 2026-09-04 | Schafer Douglas M. JR | Officer | 48,000 | $40.48 | $1.9M | Pre-planned (10b5-1) | SEC |
| 2026-09-04 | Comly Barbara J. | Officer | 44,445 | $40.49 | $1.8M | Pre-planned (10b5-1) | SEC |
| 2026-08-20 | Gallagher Thomas P. | CEO | 149,700 | $41.13 | $6.2M | Pre-planned (10b5-1) | SEC |
| 2026-08-19 | Schwarzkopf Cynthia | Director | 5,000 | $42.85 | $214,250 | Pre-planned (10b5-1) | SEC |
| 2026-08-19 | Emmons Lance | CFO | 35,000 | $42.83 | $1.5M | Pre-planned (10b5-1) | SEC |
| 2026-08-06 | Teekell Judson Gray | Director | 3,000 | $45.79 | $137,370 | Pre-planned (10b5-1) | SEC |
| 2026-08-06 | Schafer Douglas M. JR | Officer | 48,000 | $45.71 | $2.2M | Pre-planned (10b5-1) | SEC |
| 2026-08-06 | Jayabalan Harish | Officer | 20,000 | $45.90 | $918,000 | Pre-planned (10b5-1) | SEC |
| 2026-08-06 | Gallagher Thomas P. | CEO | 48,334 | $45.69 | $2.2M | Pre-planned (10b5-1) | SEC |
| 2026-08-06 | Deitzel Edward | Officer | 11,000 | $45.78 | $503,580 | Pre-planned (10b5-1) | SEC |
| 2026-08-06 | Comly Barbara J. | Officer | 44,445 | $45.69 | $2.0M | Pre-planned (10b5-1) | SEC |
Showing the latest 15 of 55 sales of $50,000+ since 2016.
Compiled automatically from public SEC filings. Not investment advice. Get every new insider purchase in the daily report.
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