Horizon Kinetics (HKHC) CFO adds 80 shares in open-market purchase

Rhea-AI Filing Summary

Horizon Kinetics Holding Corp Chief Financial Officer Mark Herndon reported an open-market purchase of 80 shares of common stock at $33.03 per share. After this transaction, he directly owns 200 shares. This filing shows a small, routine insider buy rather than a large position change.

Insider Trade Summary

Net Buyer: 80 shares ($2,642)

Net Buy 1 txn

Insider Herndon Mark

Role Chief Financial Officer

Bought 80 shs ($3K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	80	$33.03	$3K

Holdings After Transaction: Common Stock — 200 shares (Direct)

Footnotes (1)

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Herndon Mark

(Last) (First) (Middle)

470 PARK AVENUE SOUTH

8TH FLOOR SOUTH

(Street)

NEW YORK NEW YORK 10016

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Horizon Kinetics Holding Corp [ HKHC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Financial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/18/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/18/2026		P		80	A	$33.03	200	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Jay Kesslen, attorney-in-fact	03/19/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Horizon Kinetics (HKHC) report for its CFO?

Horizon Kinetics reported that CFO Mark Herndon bought 80 shares of common stock in an open-market transaction. The shares were purchased at $33.03 each, increasing his direct holdings to 200 shares after the transaction.

Was the Horizon Kinetics (HKHC) CFO’s trade a buy or a sell?

The CFO’s trade was a buy. Mark Herndon executed an open-market purchase of 80 Horizon Kinetics common shares at $33.03 per share, raising his direct ownership to a total of 200 shares following the reported transaction.

How many Horizon Kinetics (HKHC) shares does the CFO own after this Form 4?

After the reported transaction, CFO Mark Herndon directly owns 200 shares of Horizon Kinetics common stock. This reflects his 80-share open-market purchase at $33.03 per share, as disclosed in the Form 4 insider filing.

At what price did the Horizon Kinetics (HKHC) CFO purchase shares?

The Horizon Kinetics CFO bought his shares at $33.03 each. He acquired 80 shares of common stock in an open-market transaction, bringing his total direct holdings to 200 shares after the purchase reported in the Form 4.

Does the Horizon Kinetics (HKHC) Form 4 show any stock option exercises?

No, the Form 4 only shows a common stock purchase, not any option exercises. It reports a single open-market buy of 80 Horizon Kinetics common shares at $33.03 per share by CFO Mark Herndon, with no derivative transactions listed.