Horizon Kinetics (MIAX) accounts add 7,200 MIAX shares in open-market buy
Rhea-AI Filing Summary
MIAMI INTERNATIONAL HOLDINGS, INC. director Murray Stahl reported an indirect open‑market purchase of 7,200 shares of Common Stock of MIAX on March 4, 2026 at $43.38 per share. The shares are held in managed accounts of Horizon Kinetics Asset Management LLC, which now report 4,696,666 shares following the transaction.
The filing also lists fully vested options held directly by Mr. Stahl, with post‑transaction holdings of 7,500, 10,000, 14,331, and 2,500 options across several grants. The footnotes state that Mr. Stahl does not exercise investment discretion over the managed accounts and disclaims beneficial ownership except for any pecuniary interest.
Positive
- None.
Negative
- None.
Insider Trade Summary
Net Buyer: 7,200 shares
Net Buy
5 txns
Insider
STAHL MURRAY, HORIZON KINETICS ASSET MANAGEMENT LLC
Role
Director | 10% Owner
Bought
7,200 shs ($312K)
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Purchase | Common Stock | 7,200 | $43.38 | $312K |
| holding | Options | -- | -- | -- |
| holding | Options | -- | -- | -- |
| holding | Options | -- | -- | -- |
| holding | Options | -- | -- | -- |
Holdings After Transaction:
Common Stock — 4,696,666 shares (Indirect, Horizon Kinetics Asset Management LLC);
Options — 34,331 shares (Direct)
Footnotes (2)
- 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 hold securities of the Issuer. Mr. Stahl does not exercise investment discretion with respect to the securities of the Issuer that are beneficially owned by the Managed Accounts. Mr. Stahl disclaims beneficial ownership over the securities reported, except to the extent of his pecuniary interest therein, if any. The filing of this Form shall not be deemed an admission that the Mr. Stahl is the beneficial owner of such securities for purposes of Section 16 or any other purpose.
- F2. The Options given to Mr. Stahl are fully vested.
AI-generated analysis. How Rhea-AI works. Not financial advice.
FAQ
What insider transaction did MIAX report for Murray Stahl and Horizon Kinetics?
MIAX reported an indirect open-market purchase of 7,200 shares of Common Stock at $43.38 per share on March 4, 2026, held in Horizon Kinetics Asset Management LLC managed accounts that now report 4,696,666 shares following the trade.
How large is Horizon Kinetics’ reported MIAX position after the latest purchase?
After the March 4, 2026 purchase, Horizon Kinetics Asset Management LLC’s managed accounts report holding 4,696,666 MIAX common shares. The new buy of 7,200 shares slightly increased this indirect stake as disclosed in the Form 4 transaction details.
What MIAX option holdings does Murray Stahl report in this Form 4?
The filing lists several fully vested MIAX option positions held directly by Murray Stahl, with post-transaction holdings of 7,500, 10,000, 14,331 and 2,500 options. These entries are reported as holdings rather than new option grants or exercises.
How does the Form 4 describe Murray Stahl’s role at Horizon Kinetics?
The Form 4 states Murray Stahl serves as Chairman, Chief Executive Officer and Chief Investment Officer of Horizon Kinetics Asset Management LLC, which manages the accounts holding MIAX securities. He disclaims beneficial ownership except to the extent of any pecuniary interest.