| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| HORIZON KINETICS ASSET MANAGEMENT LLC | 12% | +9.1% | $396,814,791 | +$34,261,759 | 9,499,995 | +9.5% | HORIZON KINETICS ASSET MANAGEMENT LLC | 24 Nov 2025 |
| Gallagher Thomas P. | 4.9% | -4% | 4,036,237 | -4.5% | Thomas P. Gallagher | 26 Aug 2025 |
As of 31 Dec 2025, 158 institutional investors reported holding 37,335,241 shares of MIAMI INTERNATIONAL HOLDINGS, INC. - Common Stock (MIAX). This represents 46% of the company’s total 81,196,538 outstanding shares.
The largest institutional shareholders of MIAMI INTERNATIONAL HOLDINGS, INC. - Common Stock (MIAX) together control 34% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 4% | 3,284,952 | +0% | 0.2% | $145,786,169 |
| T. Rowe Price Investment Management, Inc. | 3.7% | 3,025,712 | +24% | 0.08% | $134,282,000 |
| VANGUARD GROUP INC | 2.4% | 1,928,286 | +39% | 0% | $85,577,333 |
| HORIZON KINETICS ASSET MANAGEMENT LLC | 2.2% | 1,819,798 | +32% | 1.1% | $80,762,635 |
| BlackRock, Inc. | 2.2% | 1,753,507 | +148% | 0% | $77,820,641 |
| AMERICAN CENTURY COMPANIES INC | 1.8% | 1,448,293 | +467% | 0.03% | $64,275,261 |
| Alyeska Investment Group, L.P. | 1.6% | 1,286,086 | +1.6% | 0.16% | $57,076,497 |
| Invesco Ltd. | 1.6% | 1,278,966 | +179% | 0.01% | $56,760,511 |
| North Reef Capital Management LP | 1.6% | 1,265,000 | +74% | 2.3% | $56,140,700 |
| Allspring Global Investments Holdings, LLC | 1.1% | 932,053 | +105% | 0.07% | $40,684,113 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 1.1% | 881,329 | +40% | 0.06% | $39,113,381 |
| JPMORGAN CHASE & CO | 1% | 814,340 | +0.32% | 0% | $36,140,409 |
| Caldwell Investment Management Ltd. | 0.91% | 738,810 | +11% | 21% | $33,726,334 |
| LORD, ABBETT & CO. LLC | 0.81% | 659,669 | +120% | 0.09% | $29,276,000 |
| BLAIR WILLIAM & CO/IL | 0.81% | 654,845 | +80% | 0.08% | $29,062,021 |
| JANE STREET GROUP, LLC | 0.79% | 638,050 | +30% | 0.03% | $28,316,659 |
| CITADEL ADVISORS LLC | 0.76% | 619,580 | -36% | 0.02% | $27,496,960 |
| WELLINGTON MANAGEMENT GROUP LLP | 0.76% | 616,118 | +5.7% | 0% | $27,343,316 |
| GOLDMAN SACHS GROUP INC | 0.72% | 580,665 | +201% | 0% | $25,769,913 |
| STATE STREET CORP | 0.71% | 576,385 | +921% | 0% | $25,579,966 |
| Ghisallo Capital Management LLC | 0.69% | 557,500 | +103% | 1.1% | $24,741,850 |
| Driehaus Capital Management LLC | 0.66% | 532,391 | +178% | 0.16% | $23,627,513 |
| GEODE CAPITAL MANAGEMENT, LLC | 0.63% | 512,797 | +222% | 0% | $22,763,221 |
| AMERIPRISE FINANCIAL INC | 0.55% | 447,538 | +117% | 0% | $19,861,737 |
| FRANKLIN RESOURCES INC | 0.53% | 427,154 | -1.2% | 0% | $18,957,090 |