Miami International Holdings Ownership | Who Owns Miami International Holdings?
Miami International Holdings Ownership Summary
Miami International Holdings is owned by 13.74% institutional investors, 9.73% insiders, and 76.53% retail investors. T. rowe price investment management is the largest institutional shareholder, holding 5.94% of MIAX shares. T. Rowe Price US Small-Cap Core Equity is the top mutual fund, with 1.48% of its assets in Miami International Holdings shares.
MIAX Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Miami International Holdings | 13.74% | 9.73% | 76.53% |
| Industry | Capital Markets Stocks | 31.22% | 15.48% | 53.30% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| T. rowe price investment management | 4.15M | 5.94% | $161.35M |
| Horizon kinetics asset management | 3.45M | 4.94% | $134.33M |
| Susquehanna group, llp | 3.30M | 4.72% | $128.29M |
| Blackrock funding, inc. /de | 2.23M | 3.20% | $86.90M |
| Vanguard group | 1.93M | 2.75% | $85.58M |
| Citadel advisors | 1.61M | 2.30% | $62.57M |
| Invesco | 1.59M | 2.27% | $61.69M |
| Alyeska investment group | 1.45M | 2.07% | $56.33M |
| Adage capital partners gp | 1.25M | 1.79% | $48.53M |
| Jpmorgan chase | 1.24M | 1.77% | $46.43M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Caldwell investment management | 663.81K | 9.77% | $24.92M |
| Intrinsic edge capital management | 322.52K | 2.55% | $14.31M |
| Atlas wealth partners | 37.71K | 1.51% | $1.47M |
| Bullseye asset management | 65.93K | 1.49% | $2.57M |
| Horizon kinetics asset management | 3.45M | 1.46% | $134.33M |
| Seven grand managers | 550.00K | 1.43% | $21.41M |
| North reef capital management lp | 1.01M | 1.36% | $39.48M |
| Mad river investors | 81.25K | 1.14% | $3.16M |
| Ghisallo capital management | 1.00M | 1.07% | $38.92M |
| Delta global management lp | 287.66K | 0.92% | $11.20M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Horizon kinetics asset management | 3.45M | 1.46% | 1.63M |
| T. rowe price investment management | 4.15M | 0.11% | 1.12M |
| Citadel advisors | 1.61M | 0.01% | 988.20K |
| Morgan stanley | 1.15M | 0.00% | 926.08K |
| Two sigma investments, lp | 893.72K | 0.03% | 753.39K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Jane street group | - | - | -638.05K |
| Jump financial | 18.97K | 0.01% | -266.30K |
| North reef capital management lp | 1.01M | 1.36% | -250.73K |
| American century companies | 1.22M | 0.02% | -226.81K |
| Monashee investment management | - | - | -175.00K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Clearstead advisors | 503.66K | 0.18% | 503.66K | $19.60M |
| Norges bank | 277.20K | 0.00% | 277.20K | $12.30M |
| Trexquant investment lp | 215.55K | 0.06% | 215.55K | $8.39M |
| Gillson capital lp | 206.90K | 0.72% | 206.90K | $8.33M |
| Vanguard fiduciary trust | 202.59K | 0.00% | 202.59K | $7.88M |
Sold Out
| Holder | Change |
|---|---|
| Marquette asset management | -18.00 |
| Larson financial group | -25.00 |
| Bare financial services | -27.00 |
| Bellevue asset management | -40.00 |
| Bell investment advisors | -71.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Mar 31, 2026 | 78 | -52.73% | 9,597,920 | -74.40% | 13 | 0.48% | 68 | -47.29% | 6 | -72.73% |
| Dec 31, 2025 | 88 | -16.98% | 16,609,099 | -27.80% | 23 | 2.20% | 75 | -25.00% | 9 | - |
| Sep 30, 2025 | 33 | - | 6,876,749 | - | 9 | - | 33 | - | - | - |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| T. Rowe Price US Small-Cap Core Equity | 1.41M | 1.48% | 350.10K |
| T. Rowe Price Small-Cap Stock | 1.41M | 1.48% | -1.00K |
| Vanguard Total Stock Mkt Idx Inv | 1.04M | 1.10% | - |
| Horizon Kinetics Inflation Bnfcrs ETF | 977.46K | 1.03% | - |
| T. Rowe Price Instl Small-Cap Stock | 765.19K | 0.81% | - |
| Vanguard Small Cap Index | 749.33K | 0.79% | -2.82K |
| American Century U.S. Small Cap Growth | 729.90K | 0.77% | -14.58K |
| American Century Small Cap Growth Inv | 729.90K | 0.77% | -14.58K |
| JPM Small Cap Equity-MA | 714.29K | 0.75% | 208.37K |
| JPM US Small Cap Core-Composite | 714.29K | 0.75% | 208.37K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Jun 15, 2026 | Brown Shelly | EVP, Chief Strategy Officer | Sell | $208.50K |
| Jun 11, 2026 | Schwarzkopf Cynthia | - | Sell | $813.74K |
| Jun 09, 2026 | Jayabalan Harish | EVP, CISO and CRO | Sell | $391.71K |
| Jun 08, 2026 | Jayabalan Harish | EVP, CISO and CRO | Sell | $409.91K |
| Jun 02, 2026 | Teekell Judson Gray | - | Sell | $128.34K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q2 | - | 31 |
| 2026 Q1 | 3 | 6 |
MIAX Ownership FAQ
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