Transaction · 0001437749-26-007251

HORIZON KINETICS ASSET MANAGEMENT LLC

HORIZON KINETICS ASSET MANAGEMENT LLC, 10% Owner, reported an open-market or private purchase at MIAMI INTERNATIONAL HOLDINGS, INC. involving 7200.000000 shares for an estimated $312336.00. Reported holdings after the transaction were 4626642.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

Open-market buySEC transaction code P10%
MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
Filing timeMar 06
Trade dateMar 04, 2026
Filing · SECView on SEC
InsiderProfile

Price performance since filing

Close on the filing date, the pre-filing context, and the forward return at standard windows
Price at filing
$40.98
Pre-filing
1mo ago +2.0%1w ago +0.0%1d ago +2.6%
Returns since
7d -6.1%30d -2.0%90d -3.3%180d +6.6%1y +6.6%

MIAX price since this filing

30 days of pre-filing context and vertical markers at the filing date plus 7d / 30d / 90d / 180d / 1y afterwards
MIAX since 2026-03-06Filed 181 days ago · 30 days of pre-filing context shaded
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Filing datePost-filing windows (7d, 30d, 90d, 180d, 1y)30 days of pre-filing context

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Buy
Code P
Identifier
0001437749-26-007251
Common Stock
Transaction date
Mar 04, 2026
Filed Mar 06, 2026, 12:00 AM · 2d delay
Shares
7.20k sh
$4.33k per share
Estimated value
$31.2M
Computed from shares × price
Holdings after
4.62M sh
Indirect · Horizon Kinetics Asset Management LLC

Filing warnings

Notes recorded with this filing
1 warning
amended filingThis transaction comes from an amended Form 4 filing.

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
Amended Filing Cluster Buy Director Buy 10% Owner Buy
+28score
Filing-only score

+28

Compact filing score computed from stored Form 4 facts. Version v1.

Strong filing signal

This filing has a high positive filing-only score. It may deserve closer research, but it is not an investment recommendation.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

No officer title

Officer NoDirector No10% YesOther No
Footnotes & amended
  1. F1

    Murray Stahl serves as Chairman, Chief Executive Officer, and Chief Investment Officer of Horizon Kinetics Asset Management LLC ("HKAM"), which manages funds and accounts (the "Managed Accounts") that…

  2. F2

    This amendment corrects a previous filing that incorrectly listed the amount of securities beneficially owned.

  3. F3

    The Options given to Mr. Stahl are fully vested.

Amended filing · 0001437749-26-007251
Related transactions

0 other filings

Same reporting owner
Recent company activity

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