Question 1

How many shares of MIAX does HORIZON KINETICS ASSET MANAGEMENT LLC own?

Accepted Answer

As of 2026-Q1, HORIZON KINETICS ASSET MANAGEMENT LLC holds 3.5M shares of MIAX (MIAMI INTL HLDGS INC).

Question 2

What is HORIZON KINETICS ASSET MANAGEMENT LLC's MIAX position worth?

Accepted Answer

As of 2026-Q1, HORIZON KINETICS ASSET MANAGEMENT LLC's MIAX position is worth $134.3M.

Question 3

Is HORIZON KINETICS ASSET MANAGEMENT LLC buying or selling MIAX?

Accepted Answer

In 2026-Q1, HORIZON KINETICS ASSET MANAGEMENT LLC increased their MIAX position (+89.7% change in shares).

Question 4

When did HORIZON KINETICS ASSET MANAGEMENT LLC first buy MIAX?

Accepted Answer

Based on available 13F filings, HORIZON KINETICS ASSET MANAGEMENT LLC first reported a position in MIAX in 2026-Q1. They have held the position across 3 quarters.