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

Rhea-AI Filing Summary

Horizon Kinetics Holding Corp director buys additional shares in the open market. Director Allison Nagelberg purchased 150 shares of common stock at $33.96 per share, bringing her direct holdings to 400 shares. This is a small open-market purchase that modestly increases her personal stake in the company.

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

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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^*

Nagelberg Allison

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/20/2026

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	03/20/2026		P		150	A	$33.96	400	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	03/23/2026
	** 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 HKHC director Allison Nagelberg report?

Allison Nagelberg reported an open-market purchase of Horizon Kinetics Holding Corp common stock. She bought 150 shares at $33.96 per share, increasing her direct ownership to 400 shares after the transaction, according to the Form 4 insider filing details provided.

How many Horizon Kinetics (HKHC) shares did the director buy and at what price?

The director purchased 150 shares of Horizon Kinetics Holding Corp common stock. The shares were acquired in an open-market transaction at a price of $33.96 per share, as disclosed in the Form 4 insider trading report for the transaction date provided.

What is Allison Nagelberg’s total HKHC shareholding after this transaction?

After the reported purchase, Allison Nagelberg directly holds 400 shares of Horizon Kinetics Holding Corp common stock. This total reflects her position immediately following the acquisition of 150 shares in the open market at $33.96 per share in the disclosed transaction.

Was the HKHC insider transaction a purchase or a sale?

The Horizon Kinetics Holding Corp insider transaction was a purchase. Director Allison Nagelberg executed an open-market buy of 150 common shares at $33.96 per share, increasing her direct ownership position to 400 shares following completion of the reported transaction.

Is the HKHC insider transaction direct or indirect ownership?

The reported Horizon Kinetics Holding Corp insider transaction reflects direct ownership. The Form 4 indicates the 150 purchased shares, and the resulting 400-share position, are held directly by director Allison Nagelberg, with no separate entity or indirect ownership structure noted in the data.