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Of the 12 tracked institutions holding MIAX, 5 have a 3-year clone track record — 5 of them beat the S&P. Average holder's clone alpha: +5.1pt. It's a gauge of who owns the name, not just how many.
Among the 12 tracked institutional investors we monitor, MIAX (MIAMI INTL HLDGS INC) is held with a combined value of $371.09M across 9,264,039 shares. The largest holder is BlackRock, Inc. with a position worth $86.90M. AQR CAPITAL MANAGEMENT LLC opened a new position in the most recent quarter. 8 funds increased their holdings. 3 funds reduced their position.
Total Institutional Value
$371.09M
Total Shares Held
9,264,039
Institutional Holders
12
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | BlackRock, Inc. | $86.90M | 0.00% | +27.3% |
| 2 | VANGUARD GROUP INC | $85.58M | 0.00% | +39.5% |
| 3 | CITADEL ADVISORS LLC | $62.57M | 0.04% | +159.5% |
| 4 | ADAGE CAPITAL PARTNERS GP, L.L.C. | $48.53M | 0.07% | +41.5% |
| 5 | STATE STREET CORP | $27.72M | 0.00% | +23.6% |
| 6 | MILLENNIUM MANAGEMENT LLC | $20.19M | 0.01% | +82.2% |
| 7 | WELLINGTON MANAGEMENT GROUP LLP | $17.31M | 0.00% | -27.8% |
| 8 | RENAISSANCE TECHNOLOGIES LLC | $10.57M | 0.02% | +39.2% |
| 9 | PRICE T ROWE ASSOCIATES INC /MD/ | $6.20M | 0.00% | +22.0% |
| 10 | SOROS FUND MANAGEMENT LLC | $5.16M | 0.06% | -14.2% |
| Member | Type | Date |
|---|---|---|
| Gilbert Cisneros | Buy | Mar 20, 2026 |
As of the latest SEC 13F filings, BlackRock, Inc. is the largest institutional holder of MIAX with a position worth $86.90M, representing 0.00% of their portfolio. In total, 12 institutional investors hold MIAX with a combined value of $371.09M.
In the most recent quarter, 1 fund opened a new position in MIAX. Additionally, 8 increased their holdings and 3 reduced their positions.
Institutional investors hold $371.09M worth of MIAX stock across 12 positions. The largest institutional holder is BlackRock, Inc. with $86.90M in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For MIAX, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their MIAX positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
Last Close
$42.78
2026-07-24
YTD
-2.0%
46% of 52-week range
