Rosenthal Brent D 4

What Happened

• Brent D. Rosenthal, a director of Horizon Kinetics Holding Corp (HKHC), acquired 700 shares on 2026-05-20 at $27.85 per share, for a total cost of about $19,495. The transaction is reported as a purchase (transaction code P), which investors often view as a more informative signal than routine insider sales.

Key Details

• Transaction date and price: 2026-05-20 — 700 shares @ $27.85.
• Total value: approximately $19,495.
• Transaction type: Purchase (code P); reported as open-market or private purchase.
• Filing: Form 4 filed 2026-05-21 (timely filing; not marked late).
• Shares owned after transaction: not disclosed in the provided filing details.
• No footnotes in the provided data indicating a 10b5-1 plan, option exercise, gift, or tax withholding.

Context

• This was a direct share purchase, not an option exercise or award. The size is modest (~$19.5k) for an insider purchase; while purchases can be viewed positively, they should be considered alongside other filings and company fundamentals.