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.
13F holders, Q3 2025
Institutional positions in Miami International Holdings, Inc. as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 115
- +115 vs. Q2 2025
- Shares held
- 25.5M
- +25.5M vs. Q2 2025
- Total value
- $1.03B
- +$1.03B vs. Q2 2025
- New holders
- 115
- 0 more added
- Sold out
- 0
- 0 more reduced
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting MIAX on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 206 | $2.68B |
| Q1 2026 | 202 | $1.95B |
| Q4 2025 | 161 | $1.66B |
| Q3 2025 | 115 | $1.03B |
| Q2 2025 | 0 | $0 |
| Q1 2025 | 0 | $0 |
| Q4 2024 | 0 | $0 |
| Q3 2024 | 0 | $0 |
| Q2 2024 | 0 | $0 |
| Q1 2024 | 0 | $0 |
| Q4 2023 | 0 | $0 |
| Q3 2023 | 0 | $0 |
| Q2 2023 | 0 | $0 |
| Q1 2023 | 0 | $0 |
| Q4 2022 | 0 | $0 |
| Q3 2022 | 0 | $0 |
| Q2 2022 | 0 | $0 |
| Q1 2022 | 0 | $0 |
| Q4 2021 | 0 | $0 |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding Miami International Holdings, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Invesco Ltd. | 458,720 | $18.5M | 0.00% | +458,720 | New |
| Jane Street Group, LLC | 489,598 | $19.7M | 0.02% | +489,598 | New |
| Morgan Stanley | 520,977 | $21.0M | 0.00% | +520,977 | New |
| Wellington Management Group LLP | 583,120 | $23.5M | 0.00% | +583,120 | New |
| Adage Capital Partners GP, L.L.C. | 631,652 | $25.4M | 0.04% | +631,652 | New |
| Caldwell Investment Management Ltd. | 663,810 | $27.1M | 17.76% | +663,810 | New |
| BlackRock, Inc. | 707,771 | $28.5M | 0.00% | +707,771 | New |
| North Reef Capital Management LP | 725,804 | $29.2M | 1.37% | +725,804 | New |
| JPMorgan Chase & Co | 811,711 | $32.7M | 0.00% | +811,711 | New |
| Citadel Advisors LLC | 975,050 | $39.3M | 0.03% | +975,050 | New |
| Alyeska Investment Group, L.P. | 1,265,736 | $51.0M | 0.15% | +1,265,736 | New |
| Horizon Kinetics Asset Management LLC | 1,382,403 | $55.7M | 0.68% | +1,382,403 | New |
| Vanguard Group Inc | 1,382,516 | $55.7M | 0.00% | +1,382,516 | New |
| T. Rowe Price Investment Management, Inc. | 2,430,616 | $97.9M | 0.06% | +2,430,616 | New |
| Susquehanna International Group, LLP | 3,284,852 | $132.2M | 0.19% | +3,284,852 | New |