Miami International Holdings, Inc.: which funds bought and sold
Institutions that bought and sold Miami International Holdings shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.
Between March 31, 2026 and June 30, 2026, 136 institutions that filed 13F reports for both quarters added to or opened positions in Miami International Holdings, and 86 cut or closed them. Together they added a net 21.6M shares, +43.0% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 517K shares (+2.6%); index fund managers were net buyers of 9.0M shares (+124.5%). 45 opened a new position and 40 sold out entirely.
Bought, Q2 2026 136 institutions, 45 of them new holders Sold, Q2 2026 86 institutions, 40 of them sold out
Net change, all compared +21.6M shares (+43.0%)
Net change, active managers +517K shares (+2.6%), 30 bought, 27 sold
Buyers versus sellers
136 bought 18 86 sold
Active managers and hedge funds 30 bought · 27 sold · +517K
Index fund managers 10 bought · 0 sold · +9.0M
Other institutions 96 bought · 59 sold · +12.1M
Biggest buyers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Horizon Kinetics Asset Management LLC | +4.4M +127.2% | 7.8M | $291M |
| Blackrock, Inc. Index funds | +2.8M +127.2% | 5.1M | $188M |
| Vanguard Portfolio Management LLC Index funds | +2.4M +175.4% | 3.8M | $141M |
| J Digital 6 LLC | +1.8M New position | 1.8M | $67.2M |
| Vanguard Capital Management LLC Index funds | +1.8M +123.7% | 3.2M | $118M |
| Balyasny Asset Management L.P. Hedge fund | +1.7M New position | 1.7M | $62.5M |
| Blair William & Co | +1.1M +165.8% | 1.8M | $65.8M |
| T. Rowe Price Investment Management, Inc. Active manager | +887K +21.4% | 5.0M | $187M |
| Healthcare Of Ontario Pension Plan Trust Fund | +799K +333.1% | 1.0M | $38.6M |
| State Street Corp Index funds | +721K +101.2% | 1.4M | $53.2M |
| Westfield Capital Management Co LP Active manager | +701K New position | 701K | $26M |
| Walleye Capital LLC Hedge fund | +690K +1789.9% | 728K | $27.1M |
| Price T Rowe Associates Inc Active manager | +685K +430.5% | 844K | $31.4M |
| Newedge Advisors, LLC | +643K +1646.6% | 682K | $25.3M |
| Geode Capital Management, LLC Index funds | +616K +79.0% | 1.4M | $51.9M |
| Assenagon Asset Management S.A. | +596K New position | 596K | $22.1M |
| Nuveen, LLC | +436K +188.1% | 668K | $24.8M |
| Invesco Ltd. | +436K +27.5% | 2.0M | $75.1M |
| American Century Companies Inc Active manager | +366K +29.9% | 1.6M | $59M |
| Northern Trust Corp Index funds | +328K +140.3% | 562K | $20.9M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Balyasny Asset Management L.P. Hedge fund | +1.7M New position | 1.7M | $62.5M |
| T. Rowe Price Investment Management, Inc. Active manager | +887K +21.4% | 5.0M | $187M |
| Westfield Capital Management Co LP Active manager | +701K New position | 701K | $26M |
| Walleye Capital LLC Hedge fund | +690K +1789.9% | 728K | $27.1M |
| Price T Rowe Associates Inc Active manager | +685K +430.5% | 844K | $31.4M |
| American Century Companies Inc Active manager | +366K +29.9% | 1.6M | $59M |
| Jennison Associates LLC Active manager | +267K New position | 267K | $9.9M |
| Franklin Resources Inc Active manager | +217K +38.1% | 785K | $29.2M |
| Bluecrest Capital Management Ltd Hedge fund | +200K New position | 200K | $7.4M |
| Driehaus Capital Management LLC Active manager | +169K +42.7% | 566K | $21M |
Biggest sellers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Citadel Advisors LLC Hedge fund | −1.6M Sold out | 0 | — |
| North Reef Capital Management LP Hedge fund | −763K −75.2% | 251K | $9.3M |
| Alyeska Investment Group, L.P. Hedge fund | −599K −41.4% | 849K | $31.5M |
| Ghisallo Capital Management LLC Hedge fund | −500K −50.0% | 500K | $18.6M |
| Millennium Management LLC Hedge fund | −330K −63.5% | 189K | $7M |
| Penn Capital Management Company, LLC Active manager | −274K Sold out | 0 | — |
| Renaissance Technologies LLC Hedge fund | −272K Sold out | 0 | — |
| Woodline Partners LP Hedge fund | −261K Sold out | 0 | — |
| Tudor Investment Corp Et Al Hedge fund | −260K Sold out | 0 | — |
| Allspring Global Investments Holdings, LLC | −255K −22.9% | 858K | $33.5M |
| Sei Investments Co | −219K −41.7% | 307K | $11.4M |
| Trexquant Investment LP Hedge fund | −216K Sold out | 0 | — |
| Morgan Stanley | −196K −17.1% | 951K | $35.3M |
| Wellington Management Group LLP Active manager | −183K −41.1% | 262K | $9.7M |
| Delta Global Management LP | −178K −61.9% | 110K | $4.1M |
| BNP Paribas Financial Markets | −178K −31.1% | 395K | $14.7M |
| Intrinsic Edge Capital Management LLC | −170K −61.6% | 106K | $3.9M |
| Axiom Investors LLC Active manager | −163K Sold out | 0 | — |
| New York State Common Retirement Fund | −152K −85.0% | 27K | $999,604 |
| Occudo Quantitative Strategies LP | −152K Sold out | 0 | — |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Citadel Advisors LLC Hedge fund | −1.6M Sold out | 0 | — |
| North Reef Capital Management LP Hedge fund | −763K −75.2% | 251K | $9.3M |
| Alyeska Investment Group, L.P. Hedge fund | −599K −41.4% | 849K | $31.5M |
| Ghisallo Capital Management LLC Hedge fund | −500K −50.0% | 500K | $18.6M |
| Millennium Management LLC Hedge fund | −330K −63.5% | 189K | $7M |
| Penn Capital Management Company, LLC Active manager | −274K Sold out | 0 | — |
| Renaissance Technologies LLC Hedge fund | −272K Sold out | 0 | — |
| Woodline Partners LP Hedge fund | −261K Sold out | 0 | — |
| Tudor Investment Corp Et Al Hedge fund | −260K Sold out | 0 | — |
| Trexquant Investment LP Hedge fund | −216K Sold out | 0 | — |
New positions
| Institution | Shares | Value June 30, 2026 |
|---|---|---|
| J Digital 6 LLC | 1.8M | $67.2M |
| Balyasny Asset Management L.P.Hedge fund | 1.7M | $62.5M |
| Westfield Capital Management Co LPActive manager | 701K | $26M |
| Assenagon Asset Management S.A. | 596K | $22.1M |
| Langdon Equity Partners | 283K | $10.5M |
| Nearwater Capital Markets, Ltd | 279K | $10.4M |
| Jennison Associates LLCActive manager | 267K | $9.9M |
| York Gp, Ltd. | 231K | $8.6M |
| Philadelphia Financial Management Of San Francisco, LLC | 224K | $8.3M |
| Bluecrest Capital Management LtdHedge fund | 200K | $7.4M |
Sold out
| Institution | Shares | Value March 31, 2026 |
|---|---|---|
| Citadel Advisors LLCHedge fund | 1.6M | $62.6M |
| Penn Capital Management Company, LLCActive manager | 274K | $10.7M |
| Renaissance Technologies LLCHedge fund | 272K | $10.6M |
| Woodline Partners LPHedge fund | 261K | $10.2M |
| Tudor Investment Corp Et AlHedge fund | 260K | $10.1M |
| Trexquant Investment LPHedge fund | 216K | $8.4M |
| Occudo Quantitative Strategies LP | 152K | $7.1M |
| Axiom Investors LLCActive manager | 163K | $6.4M |
| Soros Fund Management LLCHedge fund | 133K | $5.2M |
| Portolan Capital Management, LLC | 129K | $5M |
Who holds the shares
- Institutions reporting
- 204
- Ten largest holders
- 49.3% of 13F-reported shares
- Index fund managers
- 22.5% of 13F-reported shares
- Active managers and hedge funds
- 28.1% of 13F-reported shares
| Type | Bought | Sold | New | Sold out | Net change in shares | Net % |
|---|---|---|---|---|---|---|
| Active managers and hedge funds | 30 | 27 | 8 | 16 | +517K | +2.6% |
| Index fund managers | 10 | 0 | 1 | 0 | +9.0M | +124.5% |
| Other institutions | 96 | 59 | 36 | 24 | +12.1M | +52.0% |
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