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.
Key figures
- Insider buysOpen market, last 90 days
- 0
- Insider sellsLast 90 days, $36.0M in total
- 27
- 13F holdersQ2 2026, +7 vs. previous quarter
- 206
- 13F valueReported value at the end of Q2 2026
- $2.68B
- Superinvestors holdingAt the end of Q2 2026
- 0
Price chart
Superinvestors holding MIAX, Q2 2026
No superinvestor reported holding MIAX at the end of Q2 2026.
Latest insider trades
Open-market purchases and sales by Miami International Holdings, Inc. insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Sep 17, 2026 (view filing)4:43 PM ET | Sep 16 | 1 day | Brown ShellyEVP, Chief Strategy Officer | SSale | −21.2K | $38.61 | −$819.2K | −6.3%316.5K after | 10b5-1 |
| Sep 4, 2026 (view filing)4:35 PM ET | Sep 3 | 1 day | Gallagher Thomas P.Chairman & CEO | SSale | −47.0K | $42.43 | −$1.99M | −3.2%1.42M after | 10b5-1 |
| Sep 4, 2026 (view filing)4:31 PM ET | Sep 2 | 2 days | Comly Barbara J.EVP, GC & Corporate Secretary | SSale | −44.4K | $40.49 | −$1.80M | −5.0%839.6K after | 10b5-1 |
| Sep 4, 2026 (view filing)4:28 PM ET | Sep 3 | 1 day | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | SSale | −11.0K | $42.21 | −$464.3K | −8.4%119.6K after | 10b5-1 |
| Sep 4, 2026 (view filing)4:25 PM ET | Sep 2 | 2 days | Schafer Douglas M. JREVP and CIO | SSale | −48.0K | $40.48 | −$1.94M | −11.0%387.4K after | 10b5-1 |
| Sep 4, 2026 (view filing)4:21 PM ET | Sep 2 | 2 days | Teekell Judson GrayDirector | SSale | −5.54K | $41.58 | −$230.6K | −6.4%81.0K after | 10b5-1 |
| Sep 4, 2026 (view filing)4:21 PM ET | Sep 2 | 2 days | Teekell Judson GrayDirector | SSale | −3.00K | $40.89 | −$122.7K | −4.2%69.3K after | 10b5-1 |
| Aug 20, 2026 (view filing)4:12 PM ET | Aug 19 | 1 day | Gallagher Thomas P.Chairman & CEO | SSale | −149.7K | $41.13 | −$6.16M | −9.5%1.42M after | 10b5-1 |
| Aug 19, 2026 (view filing)4:12 PM ET | Aug 17 | 2 days | Schwarzkopf CynthiaDirector | SSale | −5.00K | $42.85 | −$214.3K | −5.3%88.5K after | 10b5-1 |
| Aug 19, 2026 (view filing)4:10 PM ET | Aug 17 | 2 days | Emmons LanceEVP and CFO | SSale | −35.0K | $42.83 | −$1.50M | −28.8%86.5K after | 10b5-1 |
Top 10 13F holders, Q2 2026
The largest institutional positions in Miami International Holdings, Inc. at the end of Q2 2026; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Horizon Kinetics Asset Management LLC | 7,842,173 | $291.4M | 3.30% | +4,390,624+127.2% | Added |
| BlackRock, Inc. | 5,071,754 | $188.5M | 0.00% | +2,839,074+127.2% | Added |
| T. Rowe Price Investment Management, Inc. | 5,032,970 | $187.0M | 0.12% | +887,352+21.4% | Added |
| Vanguard Portfolio Management LLC | 3,786,418 | $140.7M | 0.01% | +2,411,472+175.4% | Added |
| Susquehanna International Group, LLP | 3,355,043 | $124.7M | 0.11% | +58,697+1.8% | Added |
| Vanguard Capital Management LLC | 3,165,686 | $117.6M | 0.00% | +1,750,707+123.7% | Added |
| Invesco Ltd. | 2,020,650 | $75.1M | 0.01% | +435,647+27.5% | Added |
| J Digital 6 LLC | 1,807,234 | $67.2M | 39.72% | +1,807,234 | New |
| Blair William & Co | 1,769,432 | $65.8M | 0.17% | +1,103,651+165.8% | Added |
| Balyasny Asset Management LLC | 1,682,924 | $62.5M | 0.11% | +1,682,924 | New |