PRINCETON, NJ
MIAMI INTERNATIONAL HOLDINGS, INC.MIAX— Latest position per institution from SEC 13F filings
15
Institutional holders
48.77M
Total shares held
1.60B
Estimated value
2.44M
Avg. position size
HORIZON KINETICS ASSET MANAGEMENT LLC
CIK 1056823
Shares
7.84M
Value
291.42M
Filed
Jun 30, 2026
BLACKROCK, INC.
CIK 2012383
Shares
5.07M
Value
188.47M
Filed
Jun 30, 2026
T. ROWE PRICE INVESTMENT MANAGEMENT, INC.
CIK 1897612
Shares
5.03M
Value
187.03K
Filed
Jun 30, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 1446194
Shares
3.80M
Value
141.04M
Filed
Jun 30, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC
CIK 2100121
Shares
3.79M
Value
140.70M
Filed
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
3.17M
Value
117.64M
Filed
Jun 30, 2026
INVESCO LTD.
CIK 914208
Shares
2.02M
Value
75.09M
Filed
Jun 30, 2026
VANGUARD GROUP INC
CIK 102909
Shares
1.93M
Value
85.58M
Filed
Dec 31, 2025
J DIGITAL 6 LLC
CIK 2090663
Shares
1.81M
Value
67.16M
Filed
Jun 30, 2026
BLAIR WILLIAM & CO/IL
CIK 902367
Shares
1.77M
Value
65.75M
Filed
Jun 30, 2026
BALYASNY ASSET MANAGEMENT L.P.
CIK 1218710
Shares
1.68M
Value
62.54M
Filed
Jun 30, 2026
AMERICAN CENTURY COMPANIES INC
CIK 748054
Shares
1.59M
Value
58.98M
Filed
Jun 30, 2026
STATE STREET CORP
CIK 93751
Shares
1.43M
Value
53.25M
Filed
Jun 30, 2026
JPMORGAN CHASE & CO
CIK 19617
Shares
1.43M
Value
52.72M
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
1.40M
Value
51.87M
Filed
Jun 30, 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.
CIK 1165408
Shares
1.14M
Value
42.51M
Filed
Jun 30, 2026
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND
CIK 1535845
Shares
1.04M
Value
38.63M
Filed
Jun 30, 2026
LORD, ABBETT & CO. LLC
CIK 728100
Shares
1M
Value
37.19K
Filed
Jun 30, 2026
MORGAN STANLEY
CIK 895421
Shares
950.59K
Value
35.32M
Filed
Jun 30, 2026
TWO SIGMA INVESTMENTS, LP
CIK 1179392
Shares
888.11K
Value
33M
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | HORIZON KINETICS ASSET MANAGEMENT LLC | 1056823 | 7.84M | 291.42M | Jun 30, 2026 |
| 2 | BLACKROCK, INC. | 2012383 | 5.07M | 188.47M | Jun 30, 2026 |
| 3 | T. ROWE PRICE INVESTMENT MANAGEMENT, INC. | 1897612 | 5.03M | 187.03K | Jun 30, 2026 |
| 4 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1446194 | 3.80M | 141.04M | Jun 30, 2026 |
| 5 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2100121 | 3.79M | 140.70M | Jun 30, 2026 |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 3.17M | 117.64M | Jun 30, 2026 |
| 7 | INVESCO LTD. | 914208 | 2.02M | 75.09M | Jun 30, 2026 |
| 8 | VANGUARD GROUP INC | 102909 | 1.93M | 85.58M | Dec 31, 2025 |
| 9 | J DIGITAL 6 LLC | 2090663 | 1.81M | 67.16M | Jun 30, 2026 |
| 10 | BLAIR WILLIAM & CO/IL | 902367 | 1.77M | 65.75M | Jun 30, 2026 |
| 11 | BALYASNY ASSET MANAGEMENT L.P. | 1218710 | 1.68M | 62.54M | Jun 30, 2026 |
| 12 | AMERICAN CENTURY COMPANIES INC | 748054 | 1.59M | 58.98M | Jun 30, 2026 |
| 13 | STATE STREET CORP | 93751 | 1.43M | 53.25M | Jun 30, 2026 |
| 14 | JPMORGAN CHASE & CO | 19617 | 1.43M | 52.72M | Jun 30, 2026 |
| 15 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 1.40M | 51.87M | Jun 30, 2026 |
| 16 | ADAGE CAPITAL PARTNERS GP, L.L.C. | 1165408 | 1.14M | 42.51M | Jun 30, 2026 |
| 17 | HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 1535845 | 1.04M | 38.63M | Jun 30, 2026 |
| 18 | LORD, ABBETT & CO. LLC | 728100 | 1M | 37.19K | Jun 30, 2026 |
| 19 | MORGAN STANLEY | 895421 | 950.59K | 35.32M | Jun 30, 2026 |
| 20 | TWO SIGMA INVESTMENTS, LP | 1179392 | 888.11K | 33M | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.