Mark Herndon - 19 Aug 2026 Form 4 Insider Report for Horizon Kinetics Holding Corp (HKHC)

Reporting relationship: Chief Financial Officer
Issuer ticker: HKHC
Reported as of: 19 Aug 2026
Net transaction value: +$6,675
SEC form: 4
Accepted by SEC: 20 Aug 2026, 14:08:13 UTC
Prior SEC filing: 21 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Jay Kesslen, attorney-in-fact

Key filing fact

Mark Herndon filed Form 4 for Horizon Kinetics Holding Corp (HKHC) on 20 Aug 2026.

Key facts

This page summarizes Mark Herndon's Form 4 filing for Horizon Kinetics Holding Corp (HKHC).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 20 Aug 2026, 14:08.

Change

Previous filing in this sequence was filed on 21 May 2026.
Current net transaction value: +$6,675.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001754318 Primary reporting owner

Herndon Mark

Relationship: Chief Financial Officer
Address: C/O HORIZON KINETICS LLC, 1270 AVENUE OF THE AMERICAS 27TH FLOOR, NEW YORK
Signature: /s/ Jay Kesslen, attorney-in-fact
Signature date: 20 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

HKHC transaction

Common Stock

Purchase

Transaction value: $1,325
Shares: +50
Change %: +17%
Price: $26.50
Shares after: 350
Date: 19 Aug 2026
Ownership: Direct

HKHC transaction

Common Stock

Purchase

Transaction value: $5,350
Shares: +200
Change %: +57%
Price: $26.75
Shares after: 550
Date: 20 Aug 2026
Ownership: Direct

^* marks a reported price that did not pass the local price check.

We use cookies and similar technologies to provide certain features, enhance the user experience and, if you allow them, measure engagement and deliver advertising. Analytics and marketing storage stay off until you grant consent. By clicking on "Agree and continue", you declare your consent to the use of the selected optional cookies. to update or revoke optional consent for future visits. For more information, see our Privacy Policy .