Who Owns MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX)?Hedge Fund & Institutional Holders

$38.33+0.24 (+0.63%)Financial ServicesNYSE

Institutional Holders

50

as of Q4 2025

Total Institutional Value

$InfinityT

% of Float Held

4.2491443883439224e+291%

QoQ Change in Holders

+4 / -9

Price History

$30.74$35.80$40.85$45.91$50.96Aug 25Nov 25Mar 26

MIAX — Biggest New Institutional Buyers This Quarter

FundActionShares AddedValue Added
AMERICAN CENTURY COMPANIES INCIncreased+1.2M+$53.7B
Invesco Ltd.Increased+820K+$38.3B
Caldwell Investment Management Ltd.New Position+739K+$33.7B
HORIZON KINETICS ASSET MANAGEMENT LLCIncreased+437K+$25.1B
GOLDMAN SACHS GROUP INCIncreased+387K+$17.2B
DRIEHAUS CAPITAL MANAGEMENT LLCIncreased+341K+$15.9B
BLAIR WILLIAM & CO/ILIncreased+291K+$14.4B
Ghisallo Capital Management LLCIncreased+283K+$13.7B
ADAGE CAPITAL PARTNERS GP, L.L.C.Increased+250K+$13.6B
SUSQUEHANNA INTERNATIONAL GROUP, LLPIncreased+100+$12.8B
MASSACHUSETTS FINANCIAL SERVICES CO /MA/New Position+274K+$12.2B
BANK OF AMERICA CORP /DE/Increased+111K+$12.0B
Penn Capital Management Company, LLCNew Position+252K+$11.2B
AXIOM INVESTORS LLC /DENew Position+243K+$10.8B
AMERIPRISE FINANCIAL INCIncreased+241K+$10.7B

MIAX — Institutions Reducing or Closing Positions

FundActionShares SoldValue Sold
CITADEL ADVISORS LLCDecreased-355K-$12.3B
Schonfeld Strategic Advisors LLCDecreased-118K-$8.8B
ROYAL BANK OF CANADADecreased-198K-$8.1B
Jain Global LLCClosed Position-154K-$6.2B
Freestone Grove Partners LPClosed Position-125K-$5.0B
MARSHALL WACE, LLPClosed Position-78K-$3.1B
Quinn Opportunity Partners LLCDecreased-74K-$2.6B
ExodusPoint Capital Management, LPDecreased-44K-$2.2B
Interval Partners, LPClosed Position-44K-$1.8B
CAISSE DE DEPOT ET PLACEMENT DU QUEBECClosed Position-30K-$1.2B
Qube Research & Technologies LtdClosed Position-28K-$1.1B
DAVIDSON KEMPNER CAPITAL MANAGEMENT LPClosed Position-26K-$1.0B
D. E. Shaw & Co., Inc.Closed Position-25K-$1.0B
Weiss Asset Management LPClosed Position-25K-$1.0B
FRED ALGER MANAGEMENT, LLCDecreased-9K-$985.7M

Top Institutional Holders(Q4 2025)

#FundSharesValue% of PortfolioType
1SUSQUEHANNA INTERNATIONAL GROUP, LLP3,254,606$144.0B0.02%Share
2HORIZON KINETICS ASSET MANAGEMENT LLC1,819,798$80.8B1.09%Share
3AMERICAN CENTURY COMPANIES INC1,448,293$64.0B0.03%Share
4Alyeska Investment Group, L.P.1,286,086$57.0B0.16%Share
5Invesco Ltd.1,005,863$44.6B0.01%Share
6ADAGE CAPITAL PARTNERS GP, L.L.C.881,329$39.0B0.06%Share
7Caldwell Investment Management Ltd.738,810$33.7B20.74%Share
8JPMORGAN CHASE & CO735,671$32.0B0.00%Share
9BLAIR WILLIAM & CO/IL654,845$29.0B0.08%Share
10CITADEL ADVISORS LLC619,580$27.0B0.00%Share
11GOLDMAN SACHS GROUP INC580,665$25.0B0.00%Share
12Ghisallo Capital Management LLC557,500$24.7B1.10%Share
13DRIEHAUS CAPITAL MANAGEMENT LLC532,391$23.6B0.16%Share
14AMERIPRISE FINANCIAL INC446,918$19.0B0.00%Share
15FRANKLIN RESOURCES INC415,040$18.0B0.00%Share
16VICTORY CAPITAL MANAGEMENT INC392,122$17.0B0.01%Share
17SEI INVESTMENTS CO330,091$14.0B0.01%Share
18WELLINGTON MANAGEMENT GROUP LLP324,269$14.0B0.00%Share
19Burkehill Global Management, LP290,000$12.9B0.85%Share
20MASSACHUSETTS FINANCIAL SERVICES CO /MA/273,908$12.2B0.00%Share
21MILLENNIUM MANAGEMENT LLC284,664$12.0B0.01%Share
22Delta Global Management LP279,029$12.0B0.56%Share
23Penn Capital Management Company, LLC252,125$11.2B0.89%Share
24Woodline Partners LP261,111$11.0B0.04%Share
25AXIOM INVESTORS LLC /DE243,174$10.8B0.09%Share
26HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND234,244$10.0B0.02%Share
27Jump Financial, LLC243,000$10.0B0.12%Share
28WELLINGTON MANAGEMENT GROUP LLP222,101$9.0B0.00%Share
29TOCQUEVILLE ASSET MANAGEMENT L.P.220,775$9.0B0.13%Share
30ROYCE & ASSOCIATES LP181,466$8.1B0.08%Share
31RENAISSANCE TECHNOLOGIES LLC195,099$8.0B0.01%Share
32FEDERATED HERMES, INC.200,000$8.0B0.01%Share
33CHARLES SCHWAB INVESTMENT MANAGEMENT INC187,064$8.0B0.00%Share
34BANK OF AMERICA CORP /DE/195,010$8.0B0.00%Share
35NORTHERN TRUST CORP163,438$7.0B0.00%Share
36NEW YORK STATE COMMON RETIREMENT FUND162,191$7.0B0.01%Share
37SOROS FUND MANAGEMENT LLC154,560$6.9B0.08%Share
38Invesco Ltd.138,559$6.1B0.00%Share
39TWO SIGMA INVESTMENTS, LP140,331$6.0B0.01%Share
40MANUFACTURERS LIFE INSURANCE COMPANY, THE146,944$6.0B0.00%Share
41Polar Capital Holdings Plc123,992$5.0B0.02%Share
42UBS Group AG103,120$4.6B0.00%Share
43SUSQUEHANNA INTERNATIONAL GROUP, LLP95,400$4.0B0.00%Call
44KING LUTHER CAPITAL MANAGEMENT CORP103,819$4.0B0.02%Share
45Quinn Opportunity Partners LLC88,512$3.9B0.17%Share
46Coastal Bridge Advisors, LLC77,415$3.4B0.26%Share
47MAD RIVER INVESTORS75,050$3.3B1.52%Share
48Blackstone Inc.75,000$3.3B0.01%Share
49BANK OF AMERICA CORP /DE/75,109$3.0B0.00%Share
50TD ASSET MANAGEMENT INC80,508$3.0B0.00%Share

MIAX Institutional Ownership History

QuarterHoldersTotal ValueChange
Q4 2025162$980.9B+58
Q3 2025104$665.7B—

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As of Q4 2025, 50 institutional investors hold MIAX (MIAMI INTERNATIONAL HOLDINGS, INC.). The largest holder is SUSQUEHANNA INTERNATIONAL GROUP, LLP with $144.0B in shares. This quarter, 4 institutions opened new positions and 9 closed their positions.

Frequently Asked Questions

How many hedge funds own MIAX?

As of Q4 2025, 50 institutional investors report holding MIAX (MIAMI INTERNATIONAL HOLDINGS, INC.) in their 13F filings.

Who is the largest institutional holder of MIAX?

The largest institutional holder of MIAX is SUSQUEHANNA INTERNATIONAL GROUP, LLP with $144.0B in shares.

Is institutional ownership of MIAX increasing or decreasing?

This quarter, 4 institutions opened new positions in MIAX and 9 closed their positions.