MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) — Institutional Holders, Q2 2026
207 institutional investment managers reported a MIAX position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $2.7B. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
MIAX in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- HORIZON KINETICS ASSET MANAGEMENTAdded · +4,390,624 sh+$163.2M
- BlackRockAdded · +2,839,074 sh+$105.5M
- VANGUARD PORTFOLIO MANAGEMENTAdded · +2,411,472 sh+$89.6M
- J Digital 6New · +1,807,234 sh+$67.2M
- VANGUARD CAPITAL MANAGEMENTAdded · +1,750,707 sh+$65.1M
Biggest sellers
- CITADEL ADVISORSSold out · -1,607,780 sh-$59.7M
- North Reef Capital ManagementTrimmed · -762,920 sh-$28.4M
- Alyeska Investment Group, L.P.Trimmed · -598,704 sh-$22.2M
- Ghisallo Capital ManagementTrimmed · -500,000 sh-$18.6M
- MILLENNIUM MANAGEMENTTrimmed · -329,596 sh-$12.2M
MIAX 13F holders ranked 1–100 of 207
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | HORIZON KINETICS ASSET MANAGEMENT#1 · 7,842,173 sh | 7,842,173 | $291.4M | 3.30% | +127.2% |
| 2 | BlackRock#2 · 5,071,754 sh | 5,071,754 | $188.5M | <0.01% | +127.2% |
| 3 | T. Rowe Price Investment Management#3 · 5,032,970 sh | 5,032,970 | $187.0M | 0.12% | +21.4% |
| 4 | VANGUARD PORTFOLIO MANAGEMENT#4 · 3,786,418 sh | 3,786,418 | $140.7M | <0.01% | +175.4% |
| 5 | SUSQUEHANNA INTERNATIONAL GROUP, LLP#5 · 3,355,043 sh | 3,355,043 | $124.7M | <0.01% | +1.8% |
| 6 | VANGUARD CAPITAL MANAGEMENT#6 · 3,165,686 sh | 3,165,686 | $117.6M | <0.01% | +123.7% |
| 7 | Invesco Ltd.#7 · 2,020,650 sh | 2,020,650 | $75.1M | <0.01% | +27.5% |
| 8 | J Digital 6#8 · 1,807,234 sh | 1,807,234 | $67.2M | 39.72% | New |
| 9 | BLAIR WILLIAM#9 · 1,769,432 sh | 1,769,432 | $65.8M | 0.17% | +165.8% |
| 10 | BALYASNY ASSET MANAGEMENT L.P.#10 · 1,682,924 sh | 1,682,924 | $62.5M | 0.08% | New |
| 11 | AMERICAN CENTURY COMPANIES#11 · 1,587,196 sh | 1,587,196 | $59.0M | 0.03% | +29.9% |
| 12 | STATE STREET#12 · 1,432,894 sh | 1,432,894 | $53.2M | <0.01% | +101.2% |
| 13 | JPMORGAN CHASE#13 · 1,427,881 sh | 1,427,881 | $52.7M | <0.01% | +15.3% |
| 14 | GEODE CAPITAL MANAGEMENT#14 · 1,395,680 sh | 1,395,680 | $51.9M | <0.01% | +79.0% |
| 15 | ADAGE CAPITAL PARTNERS GP, L.L.C.#15 · 1,143,920 sh | 1,143,920 | $42.5M | 0.06% | -8.3% |
| 16 | HEALTHCARE OF ONTARIO PENSION PLAN FUND#16 · 1,039,449 sh | 1,039,449 | $38.6M | 0.05% | +333.1% |
| 17 | LORD, ABBETT#17 · 1,000,866 sh | 1,000,866 | $37.2M | 0.11% | +16.3% |
| 18 | MORGAN STANLEY#18 · 950,593 sh | 950,593 | $35.3M | <0.01% | -17.1% |
| 19 | Allspring Global Investments#19 · 857,682 sh | 857,682 | $33.5M | 0.05% | -22.9% |
| 20 | TWO SIGMA INVESTMENTS#20 · 888,109 sh | 888,109 | $33.0M | 0.02% | -0.6% |
| 21 | BANK OF AMERICA#21 · 856,980 sh | 856,980 | $31.8M | <0.01% | -4.9% |
| 22 | Alyeska Investment Group, L.P.#22 · 848,750 sh | 848,750 | $31.5M | 0.08% | -41.4% |
| 23 | PRICE T ROWE ASSOCIATES#23 · 844,464 sh | 844,464 | $31.4M | <0.01% | +430.5% |
| 24 | FRANKLIN RESOURCES#24 · 784,799 sh | 784,799 | $29.2M | <0.01% | +38.1% |
| 25 | Walleye Capital#25 · 728,034 sh | 728,034 | $27.1M | 0.10% | +1789.9% |
| 26 | WESTFIELD CAPITAL MANAGEMENT#26 · 700,741 sh | 700,741 | $26.0M | 0.09% | New |
| 27 | NewEdge Advisors#27 · 681,610 sh | 681,610 | $25.3M | 0.08% | New |
| 28 | Nuveen#28 · 668,115 sh | 668,115 | $24.8M | <0.01% | +188.1% |
| 29 | Caldwell Investment Management Ltd.#29 · 600,000 sh | 600,000 | $22.3M | 14.63% | -9.6% |
| 30 | UBS Group AG#30 · 567,797 sh | 567,797 | $21.1M | <0.01% | +34.1% |
| 31 | DRIEHAUS CAPITAL MANAGEMENT#31 · 566,052 sh | 566,052 | $21.0M | 0.12% | +42.7% |
| 32 | NORTHERN#32 · 562,337 sh | 562,337 | $20.9M | <0.01% | +140.3% |
| 33 | AMERIPRISE FINANCIAL#33 · 559,485 sh | 559,485 | $20.8M | <0.01% | +9.8% |
| 34 | SEVEN GRAND MANAGERS#34 · 550,000 sh | 550,000 | $20.4M | 0.82% | 0.0% |
| 35 | Ghisallo Capital Management#35 · 500,000 sh | 500,000 | $18.6M | 0.36% | -50.0% |
| 36 | Clearstead Advisors#36 · 473,937 sh | 473,937 | $17.6M | 0.17% | -5.9% |
| 37 | ROYCE & ASSOCIATES#37 · 452,813 sh | 452,813 | $16.8M | 0.14% | +46.4% |
| 38 | VICTORY CAPITAL MANAGEMENT#38 · 427,425 sh | 427,425 | $15.9M | <0.01% | +9.7% |
| 39 | MASSACHUSETTS FINANCIAL SERVICES#39 · 406,274 sh | 406,274 | $15.1M | <0.01% | +19.0% |
| 40 | GOLDMAN SACHS GROUP#40 · 399,844 sh | 399,844 | $14.9M | <0.01% | -6.2% |
| 41 | BNP PARIBAS FINANCIAL MARKETS#41 · 394,688 sh | 394,688 | $14.7M | <0.01% | -31.1% |
| 42 | CHARLES SCHWAB INVESTMENT MANAGEMENT#42 · 373,541 sh | 373,541 | $13.9M | <0.01% | +57.4% |
| 43 | D. E. Shaw#43 · 355,528 sh | 355,528 | $13.2M | <0.01% | +10.8% |
| 44 | TOCQUEVILLE ASSET MANAGEMENT L.P.#44 · 338,225 sh | 338,225 | $12.6M | 0.17% | +8.4% |
| 45 | VANGUARD FIDUCIARY#45 · 315,336 sh | 315,336 | $11.7M | <0.01% | +55.7% |
| 46 | SEI INVESTMENTS#46 · 307,062 sh | 307,062 | $11.4M | 0.01% | -41.7% |
| 47 | Assenagon Asset Management S.A.#47 · 297,832 sh | 297,832 | $11.1M | — | New |
| 48 | BARCLAYS PLC#48 · 295,775 sh | 295,775 | $11.0M | <0.01% | +7.8% |
| 49 | Burkehill Global Management#49 · 290,000 sh | 290,000 | $10.8M | 0.39% | 0.0% |
| 50 | MAD RIVER INVESTORS#50 · 289,000 sh | 289,000 | $10.7M | 4.01% | +255.7% |
| 51 | MARSHALL WACE, LLP#51 · 287,480 sh | 287,480 | $10.7M | <0.01% | +134.4% |
| 52 | Langdon Equity Partners#52 · 282,500 sh | 282,500 | $10.5M | 5.87% | New |
| 53 | Nearwater Capital Markets, Ltd#53 · 279,000 sh | 279,000 | $10.4M | 0.18% | New |
| 54 | JENNISON ASSOCIATES#54 · 267,303 sh | 267,303 | $9.9M | <0.01% | New |
| 55 | WELLINGTON MANAGEMENT GROUP LLP#55 · 262,170 sh | 262,170 | $9.7M | <0.01% | -41.1% |
| 56 | Caprock Group#56 · 259,873 sh | 259,873 | $9.7M | 0.19% | +158.4% |
| 57 | North Reef Capital Management#57 · 251,354 sh | 251,354 | $9.3M | 0.36% | -75.2% |
| 58 | SG Americas Securities#58 · 242,518 sh | 242,518 | $9.0M | <0.01% | +6756.6% |
| 59 | NORGES BANK#59 · 237,900 sh | 237,900 | $8.8M | <0.01% | — |
| 60 | York GP, Ltd.#60 · 230,729 sh | 230,729 | $8.6M | — | New |
| 61 | FEDERATED HERMES#61 · 224,410 sh | 224,410 | $8.3M | 0.01% | +11.6% |
| 62 | Philadelphia Financial Management of San Francisco#62 · 223,715 sh | 223,715 | $8.3M | 1.68% | New |
| 63 | Bank of New York Mellon#63 · 220,387 sh | 220,387 | $8.2M | <0.01% | +182.6% |
| 64 | Schonfeld Strategic Advisors#64 · 200,181 sh | 200,181 | $7.4M | 0.03% | +27.0% |
| 65 | BlueCrest Capital Management Ltd#65 · 200,000 sh | 200,000 | $7.4M | 0.24% | New |
| 66 | Hudson Bay Capital Management#66 · 190,223 sh | 190,223 | $7.1M | 0.02% | +541.9% |
| 67 | MILLENNIUM MANAGEMENT#67 · 189,105 sh | 189,105 | $7.0M | <0.01% | -63.5% |
| 68 | Coastal Bridge Advisors#68 · 183,761 sh | 183,761 | $6.8M | 0.42% | +135.5% |
| 69 | MANUFACTURERS LIFE INSURANCE COMPANY, THE#69 · 177,273 sh | 177,273 | $6.6M | <0.01% | +8.1% |
| 70 | XTX Topco Ltd#70 · 170,856 sh | 170,856 | $6.3M | 0.08% | +485.8% |
| 71 | WELLS FARGO & COMPANY#71 · 164,132 sh | 164,132 | $6.1M | <0.01% | +168.3% |
| 72 | OSAIC#72 · 157,902 sh | 157,902 | $5.9M | <0.01% | +251.3% |
| 73 | Optiver Holding B.V.#73 · 152,285 sh | 152,285 | $5.7M | <0.01% | -55.6% |
| 74 | NORTHWESTERN MUTUAL WEALTH MANAGEMENT#74 · 151,179 sh | 151,179 | $5.6M | <0.01% | New |
| 75 | Sone Capital Management#75 · 138,903 sh | 138,903 | $5.2M | 0.39% | New |
| 76 | HMV Wealth Advisors#76 · 137,957 sh | 137,957 | $5.1M | 2.00% | +1191.4% |
| 77 | Focus Partners Advisor Solutions#77 · 136,736 sh | 136,736 | $5.1M | 0.04% | +1224.6% |
| 78 | FJ Capital Management#78 · 119,299 sh | 119,299 | $4.4M | 0.58% | New |
| 79 | Moors & Cabot#79 · 118,904 sh | 118,904 | $4.4M | 0.17% | +208.7% |
| 80 | One Charles Private Wealth Services#80 · 118,419 sh | 118,419 | $4.4M | 1.01% | New |
| 81 | RAYMOND JAMES FINANCIAL#81 · 116,413 sh | 116,413 | $4.3M | <0.01% | -2.5% |
| 82 | HighTower Advisors#82 · 112,298 sh | 112,298 | $4.2M | <0.01% | +290.6% |
| 83 | TD ASSET MANAGEMENT#83 · 109,708 sh | 109,708 | $4.1M | <0.01% | +3.5% |
| 84 | Delta Global Management#84 · 109,665 sh | 109,665 | $4.1M | 0.44% | -61.9% |
| 85 | Intrinsic Edge Capital Management#85 · 106,019 sh | 106,019 | $3.9M | 0.41% | -61.6% |
| 86 | Qube Research & Technologies Ltd#86 · 101,105 sh | 101,105 | $3.8M | <0.01% | +22.6% |
| 87 | Bullseye Asset Management#87 · 98,170 sh | 98,170 | $3.6M | 1.85% | +48.9% |
| 88 | ALLIANCEBERNSTEIN L.P.#88 · 89,200 sh | 89,200 | $3.5M | <0.01% | +239.2% |
| 89 | RHUMBLINE ADVISERS#89 · 89,668 sh | 89,668 | $3.3M | <0.01% | +207.0% |
| 90 | G2 Investment Partners Management#90 · 85,000 sh | 85,000 | $3.2M | 0.58% | +61.6% |
| 91 | Polar Capital Plc#91 · 82,603 sh | 82,603 | $3.1M | <0.01% | -30.4% |
| 92 | MBL Wealth#92 · 78,902 sh | 78,902 | $2.9M | — | -9.3% |
| 93 | CITIGROUP#93 · 77,286 sh | 77,286 | $2.9M | <0.01% | -26.7% |
| 94 | DEUTSCHE BANK AG\#94 · 75,052 sh | 75,052 | $2.8M | <0.01% | +267.5% |
| 95 | SPIREPOINT PRIVATE CLIENT#95 · 68,883 sh | 68,883 | $2.6M | 0.21% | 0.0% |
| 96 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP#96 · 63,344 sh | 63,344 | $2.4M | <0.01% | -57.7% |
| 97 | Voleon Capital Management#97 · 58,234 sh | 58,234 | $2.2M | 0.04% | +142.3% |
| 98 | EagleClaw Capital Managment#98 · 57,800 sh | 57,800 | $2.1M | 0.29% | New |
| 99 | ROYAL BANK OF CANADA#99 · 53,256 sh | 53,256 | $2.0M | <0.01% | +417.0% |
| 100 | CREDIT AGRICOLE S A#100 · 51,002 sh | 51,002 | $1.9M | <0.01% | 0.0% |
Funds that sold out of MIAX in Q2 2026 (41)
Held MIAX at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| CITADEL ADVISORS1,607,780 sh | 1,607,780 | $62.6M |
| Penn Capital Management Company273,834 sh | 273,834 | $10.7M |
| RENAISSANCE TECHNOLOGIES271,500 sh | 271,500 | $10.6M |
| Woodline Partners261,111 sh | 261,111 | $10.2M |
| TUDOR INVESTMENT ET AL259,765 sh | 259,765 | $10.1M |
| Trexquant Investment215,549 sh | 215,549 | $8.4M |
| OCCUDO QUANTITATIVE STRATEGIES151,676 sh | 151,676 | $7.1M |
| AXIOM INVESTORS163,282 sh | 163,282 | $6.4M |
| SOROS FUND MANAGEMENT132,600 sh | 132,600 | $5.2M |
| Portolan Capital Management128,819 sh | 128,819 | $5.0M |
| Prana Capital Management123,353 sh | 123,353 | $4.8M |
| Aquatic Capital Management119,528 sh | 119,528 | $4.7M |
| Quantbot Technologies96,009 sh | 96,009 | $3.7M |
| VOLORIDGE INVESTMENT MANAGEMENT85,621 sh | 85,621 | $3.3M |
| WEXFORD CAPITAL80,400 sh | 80,400 | $3.1M |
| Quantinno Capital Management55,487 sh | 55,487 | $2.2M |
| Corient Private Wealth51,430 sh | 51,430 | $2.0M |
| Covalis Capital LLP50,000 sh | 50,000 | $1.9M |
| Squarepoint Ops40,222 sh | 40,222 | $1.6M |
| Swiss Life Asset Management Ltd15,287 sh | 15,287 | $1.6M |
| Entropy Technologies40,076 sh | 40,076 | $1.6M |
| HRT FINANCIAL37,167 sh | 37,167 | $1.4M |
| Concentric Capital Strategies25,753 sh | 25,753 | $1.0M |
| VIRGINIA RETIREMENT SYSTEMS ET Al24,500 sh | 24,500 | $953.5K |
| Jain Global17,143 sh | 17,143 | $667.2K |
| DARK FOREST CAPITAL MANAGEMENT15,940 sh | 15,940 | $620.4K |
| IMC-Chicago14,577 sh | 14,577 | $567.3K |
| Verdad Advisers12,282 sh | 12,282 | $478.0K |
| Blackstone11,508 sh | 11,508 | $447.9K |
| Independent Solutions Wealth Management11,056 sh | 11,056 | $430.3K |
| Man Group plc10,674 sh | 10,674 | $415.4K |
| Quinn Opportunity Partners10,486 sh | 10,486 | $408.1K |
| AQR CAPITAL MANAGEMENT8,476 sh | 8,476 | $329.9K |
| Brevan Howard Capital Management5,534 sh | 5,534 | $215.4K |
| EMERALD MUTUAL FUND ADVISERS2,500 sh | 2,500 | $97.3K |
| HFM Investment Advisors1,301 sh | 1,301 | $50.6K |
| MCF Advisors34 sh | 34 | $1.3K |
| Cornerstone Financial Management12 sh | 12 | $467.00 |
| MAI Capital Management10 sh | 10 | $390.00 |
| IFP Advisors8 sh | 8 | $311.00 |
| CENTRAL7 sh | 7 | $273.00 |
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.