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ISSUER PROFILE · CIK 0001438472 · CUSIP 59356Q108

MIAMI INTERNATIONAL HOLDINGS, INC.MIAX

1 13D/G filings 1 distinct filers 5 insider transactions (365d)

Cross-Reference Snapshot

Activist filings
1
1 SCHEDULE 13D/A
Distinct filers
1
single filer
Insiders (365d)
5
0 buys · 1 sales
Latest short DTC
2.81
as of 2026-04-30

Institutional Consensus · 2025-12-31

Held by elite portfolio managers
1 holder · $6.86M
Soros Fund Management

13D/G Filings Timeline · 1 total

FiledFormFilerStakeSharesIntent
2026-05-21 SCHEDULE 13D/A HORIZON KINETICS ASSET MANAGEMENT LLC 7.80% 7,400,316 view →

Form 4 Insider Transactions · last 365d

DateInsiderRoleTypeSharesPriceValue
2026-05-04 Brown Shelly officer Option exercise 16,000 $12.00 $192K
2026-05-04 Teekell Judson Gray director Sale 3,000 $47.30 $142K
2026-05-04 Schafer Douglas M. JR officer Option exercise 48,000 $12.00 $576K
2026-05-04 Eckert Kurt M. director Option exercise 5,625 $12.00 $68K
2026-05-04 Comly Barbara J. officer Option exercise 28,000 $12.00 $336K

FINRA Short Interest History

SettlementShort InterestDays to Cover% Δ vs prior
2026-04-30 2,354,553 2.81 +4.8%
2026-04-15 2,246,370 1.62 -33.8%
2026-03-31 3,394,120 2.57 +34.7%
2026-03-13 2,519,833 1.78 +16.2%
2026-02-27 2,169,226 1.01 -17.9%
2026-02-13 2,643,801 1.86 -6.1%
2026-01-30 2,816,364 3.65 +18.4%
2026-01-15 2,377,849 2.25 -40.5%
2025-12-31 3,996,304 3.15 +99.1%
2025-12-15 2,007,443 2.19 +50.5%

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