Who owns MIAMI INTERNATIONAL HOLDINGS, INC.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of MIAX from SEC Form 13F filings across 207 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 207 institutions disclosed 72.1M shares of MIAMI INTERNATIONAL HOLDINGS, INC. worth $2.68B — about 75.7% of shares outstanding; the largest disclosed holder is HORIZON KINETICS ASSET MANAGEMENT LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
207
13F holders
$2.68B
value, 2026 filers
75.7%
of shares outstanding (72.1M sh)
49
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of MIAX's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | HORIZON KINETICS ASSET MANAGEMENT LLC | 7.8M | $291.4M | 3.3% | 8.2% | +127.2% |
| 2 | BlackRock, Inc. | 5.1M | $188.5M | 0.0% | 5.3% | +127.2% |
| 3 | T. Rowe Price Investment Management, Inc. | 5.0M | $187.0M | 0.1% | 5.3% | +21.4% |
| 4 | VANGUARD PORTFOLIO MANAGEMENT LLC | 3.8M | $140.7M | 0.0% | 4% | +175.4% |
| 5 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 3.4M | $124.7M | 0.0% | 3.5% | +1.8% |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 3.2M | $117.6M | 0.0% | 3.3% | +123.7% |
| 7 | Invesco Ltd. | 2.0M | $75.1M | 0.0% | 2.1% | +27.5% |
| 8 | J Digital 6 LLCNEW | 1.8M | $67.2M | 39.7% | 1.9% | new |
| 9 | BLAIR WILLIAM & CO/IL | 1.8M | $65.8M | 0.2% | 1.9% | +165.8% |
| 10 | Balyasny Asset Management L.P.NEW | 1.7M | $62.5M | 0.1% | 1.8% | new |
| 11 | AMERICAN CENTURY COMPANIES INC | 1.6M | $59.0M | 0.0% | 1.7% | +29.9% |
| 12 | STATE STREET CORP | 1.4M | $53.2M | 0.0% | 1.5% | +101.2% |
| 13 | JPMORGAN CHASE & CO | 1.4M | $52.7M | 0.0% | 1.5% | +15.3% |
| 14 | GEODE CAPITAL MANAGEMENT, LLC | 1.4M | $51.9M | 0.0% | 1.5% | +79.0% |
| 15 | ADAGE CAPITAL PARTNERS GP, L.L.C. | 1.1M | $42.5M | 0.1% | 1.2% | -8.3% |
| 16 | HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 1.0M | $38.6M | 0.1% | 1.1% | +333.1% |
| 17 | LORD, ABBETT & CO. LLC | 1.0M | $37.2M | 0.1% | 1.1% | +16.3% |
| 18 | MORGAN STANLEY | 950,593 | $35.3M | 0.0% | 1% | -17.1% |
| 19 | TWO SIGMA INVESTMENTS, LP | 888,109 | $33.0M | 0.0% | 0.9% | -0.6% |
| 20 | Allspring Global Investments Holdings, LLC | 857,682 | $33.5M | 0.1% | 0.9% | -22.9% |
| 21 | BANK OF AMERICA CORP /DE/ | 856,980 | $31.8M | 0.0% | 0.9% | -4.9% |
| 22 | Alyeska Investment Group, L.P. | 848,750 | $31.5M | 0.1% | 0.9% | -41.4% |
| 23 | PRICE T ROWE ASSOCIATES INC /MD/ | 844,464 | $31.4M | 0.0% | 0.9% | +430.5% |
| 24 | FRANKLIN RESOURCES INC | 784,799 | $29.2M | 0.0% | 0.8% | +38.1% |
| 25 | Walleye Capital LLC | 728,034 | $27.1M | 0.1% | 0.8% | +1789.9% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.