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, Q1 2026
Institutional positions in Miami International Holdings, Inc. as of Mar 31, 2026. 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
- 202
- +46 vs. Q4 2025
- Shares held
- 50.2M
- +15.0M (+42.5%) vs. Q4 2025
- Total value
- $1.95B
- +$390.9M (+25.1%) vs. Q4 2025
- New holders
- 80
- 84 more added
- Sold out
- 34
- 26 more reduced
5 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding Miami International Holdings, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Horizon Kinetics Asset Management LLC | 3,451,549 | $134.3M | 1.46% | +1,631,751+89.7% | Added |
| T. Rowe Price Investment Management, Inc. | 4,145,618 | $161.3M | 0.11% | +1,119,906+37.0% | Added |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −638,050−100.0% | Sold out |
| Monashee Investment Management LLC | 0 | $0 | 0.00% | −175,000−100.0% | Sold out |
| Lykos Global Management, LP | 0 | $0 | 0.00% | −175,000−100.0% | Sold out |
| Unisphere Establishment | 0 | $0 | 0.00% | −135,000−100.0% | Sold out |
| LMR Partners LLP | 0 | $0 | 0.00% | −109,795−100.0% | Sold out |
| Maven Securities LTD | 0 | $0 | 0.00% | −69,920−100.0% | Sold out |
| Capelight Capital Asset Management LP | 0 | $0 | 0.00% | −63,000−100.0% | Sold out |
| Harvey Partners, LLC | 0 | $0 | 0.00% | −50,000−100.0% | Sold out |
| Panoramic Capital, LLC | 0 | $0 | 0.00% | −46,087−100.0% | Sold out |
| Calamos Advisors LLC | 0 | $0 | 0.00% | −41,364−100.0% | Sold out |
| Maltese Capital Management LLC | 0 | $0 | 0.00% | −38,675−100.0% | Sold out |
| Quadrature Capital Ltd | 0 | $0 | 0.00% | −31,915−100.0% | Sold out |
| Element Capital Management LLC | 0 | $0 | 0.00% | −27,855−100.0% | Sold out |
| Hound Partners, LLC | 0 | $0 | 0.00% | −25,000−100.0% | Sold out |
| VARCOV Co. | 0 | $0 | 0.00% | −22,389−100.0% | Sold out |
| Symmetry Investments LP | 0 | $0 | 0.00% | −22,000−100.0% | Sold out |
| First Trust Advisors LP | 0 | $0 | 0.00% | −21,671−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −19,739−100.0% | Sold out |
| ExodusPoint Capital Management, LP | 0 | $0 | 0.00% | −10,970−100.0% | Sold out |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −10,402−100.0% | Sold out |
| Penserra Capital Management LLC | 0 | $0 | 0.00% | −8,376−100.0% | Sold out |
| Centiva Capital, LP | 0 | $0 | 0.00% | −6,036−100.0% | Sold out |
| Armistice Capital, LLC | 0 | $0 | 0.00% | −5,947−100.0% | Sold out |
| Texas Yale Capital Corp. | 0 | $0 | 0.00% | −5,000−100.0% | Sold out |
| Arizona State Retirement System | 0 | $0 | 0.00% | −4,536−100.0% | Sold out |
| Amalgamated Bank | 0 | $0 | 0.00% | −740−100.0% | Sold out |
| Game Plan Financial Advisors, LLC | 0 | $0 | 0.00% | −250−100.0% | Sold out |
| DV Trading LLC | 0 | $0 | 0.00% | −200−100.0% | Sold out |
| Smartleaf Asset Management LLC | 0 | $0 | 0.00% | −117−100.0% | Sold out |
| Bell Investment Advisors, Inc | 0 | $0 | 0.00% | −71−100.0% | Sold out |
| Bellevue Asset Management, LLC | 0 | $0 | 0.00% | −40−100.0% | Sold out |
| Bare Financial Services, Inc | 0 | $0 | 0.00% | −27−100.0% | Sold out |
| Larson Financial Group LLC | 0 | $0 | 0.00% | −25−100.0% | Sold out |
| Marquette Asset Management, LLC | 0 | $0 | 0.00% | −18−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |
| Norges Bank | – | – | – | – | Not filed |
| Sandia Investment Management LP | – | – | – | – | Not filed |
| Comerica Bank | – | – | – | – | Not filed |
| Global Retirement Partners, LLC | – | – | – | – | Not filed |