MIAX
Miami International Holdings, Inc. · Financial Services · Financial - Capital Markets
Momentum inputs (comparable managers):
holder breadth +30.0% ·
share flow +30.0% ·
net new positions +20.0%
· formula
Broad accumulation: rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | JPMorgan Chase ✦ | 1.62M | n/a | $65.36M | 0.0% | n/c | 1 | SEC ↗ ×6 |
| 2 | The Vanguard Group ✦ (passive) | 1.38M | New | $55.66M | 0.0% | New | 1 | SEC ↗ ×3 |
| 3 | Citadel Advisors ✦ | 975.05K | New | $39.26M | 0.0% | New | 1 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 707.77K | New | $28.49M | 0.0% | New | 1 | SEC ↗ ×7 |
| 5 | Adage Capital Partners ✦ | 631.65K | New | $25.43M | 0.0% | New | 1 | SEC ↗ |
| 6 | Wellington Management ✦ | 583.12K | New | $23.48M | 0.0% | New | 1 | SEC ↗ ×4 |
| 7 | Morgan Stanley ✦ | 520.98K | n/a | $20.97M | 0.0% | n/c | 1 | SEC ↗ ×4 |
| 8 | T. Rowe Price ✦ | 398.78K | New | $16.05M | 0.0% | New | 1 | SEC ↗ |
| 9 | Goldman Sachs Group ✦ | 193.19K | n/a | $7.78M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 10 | Geode Capital Management ✦ (passive) | 159.39K | New | $6.42M | 0.0% | New | 1 | SEC ↗ ×2 |
| 11 | Millennium Management ✦ | 158.48K | New | $6.38M | 0.0% | New | 1 | SEC ↗ |
| 12 | Soros Fund Management ✦ | 104.26K | New | $4.20M | 0.1% | New | 1 | SEC ↗ |
| 13 | Marshall Wace ✦ | 77.96K | New | $3.14M | 0.0% | New | 1 | SEC ↗ ×3 |
| 14 | State Street Global Advisors ✦ (passive) | 56.45K | New | $2.27M | 0.0% | New | 1 | SEC ↗ |
| 15 | Two Sigma Investments ✦ | 50.01K | New | $2.01M | 0.0% | New | 1 | SEC ↗ |
| 16 | D. E. Shaw & Co. ✦ | 25.06K | New | $1.01M | 0.0% | New | 1 | SEC ↗ |
| 17 | Fidelity (FMR) ✦ | 75 | New | $3,020 | 0.0% | New | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| The Vanguard Group | $55.66M | 0.0% |
| Citadel Advisors | $39.26M | 0.0% |
| BlackRock | $28.49M | 0.0% |
| Adage Capital Partners | $25.43M | 0.0% |
| Wellington Management | $23.48M | 0.0% |
| T. Rowe Price | $16.05M | 0.0% |
| Geode Capital Management | $6.42M | 0.0% |
| Millennium Management | $6.38M | 0.0% |
| Soros Fund Management | $4.20M | 0.1% |
| Marshall Wace | $3.14M | 0.0% |
| State Street Global Advisors | $2.27M | 0.0% |
| Two Sigma Investments | $2.01M | 0.0% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 200 holders, 49.13M shares, $1.70B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold: shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Officer · 40.00K sh · $1.33M
Officer · 21.22K sh · $819,188
Officer · 11.00K sh · $464,310
Officer, Director · 47.00K sh · $1.99M
Officer · 44.45K sh · $1.80M
Officer · 48.00K sh · $1.94M
Director · 5.54K sh · $230,561
Director · 3.00K sh · $122,670
Officer, Director · 149.70K sh · $6.16M
Director · 5.00K sh · $214,250
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
7.8% of class · View original SEC filing ↗