STOCK TITAN

Director Brent Rosenthal buys 700 Horizon Kinetics (HKHC) shares in open market

Filing Impact
(Neutral)
Filing Sentiment
(Positive)
Form Type
4

Rhea-AI Filing Summary

Horizon Kinetics Holding Corp director Brent D. Rosenthal bought 700 shares of common stock in an open-market purchase$27.85 per share on the transaction date and now directly holds 2,450 common shares following this trade.

Positive

  • None.

Negative

  • None.
Insider Rosenthal Brent D
Role null
Bought 700 shs ($19K)
Type Security Shares Price Value
Purchase Common Stock 700 $27.85 $19K
Holdings After Transaction: Common Stock — 2,450 shares (Direct, null)
Footnotes (1)
Shares purchased 700 shares Open-market purchase of common stock on transaction date
Purchase price $27.85 per share Price paid for HKHC common stock in the reported trade
Shares owned after trade 2,450 shares Director’s direct common stock holdings following the transaction
Net buy shares 700 shares Net buy direction for this Form 4 per transaction summary
open-market purchase financial
"transaction_action: open-market purchase of common stock shares"
An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.
Common Stock financial
"security_title: Common Stock reported in the transaction"
Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.
Form 4 regulatory
"insider transaction was reported on a Form 4 filing"
Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.
direct ownership financial
"total_shares_following_transaction are listed as direct ownership"
SEC Form 4
FORM 4UNITED 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*
Rosenthal Brent D

(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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/20/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock05/20/2026P700A$27.852,450D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
/s/Jay Kesslen, attorney-in-fact05/21/2026
** Signature of Reporting PersonDate
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) disclose?

Horizon Kinetics disclosed that director Brent D. Rosenthal bought 700 shares of common stock. The open-market purchase was reported on a Form 4 and increased his directly held position to 2,450 shares after the transaction.

How many Horizon Kinetics (HKHC) shares did the director buy?

Director Brent D. Rosenthal purchased 700 shares of Horizon Kinetics common stock. This open-market transaction raised his direct ownership to 2,450 shares as reported in the Form 4 insider trading disclosure for the specified transaction date.

At what price were the Horizon Kinetics (HKHC) shares purchased?

The 700 Horizon Kinetics common shares were purchased at $27.85 per share. This price reflects the open-market transaction reported, and the filing shows Rosenthal’s updated direct ownership of 2,450 common shares following the completed trade.

What is Brent D. Rosenthal’s Horizon Kinetics (HKHC) stake after the trade?

After the reported open-market purchase, Brent D. Rosenthal directly owns 2,450 shares of Horizon Kinetics common stock. The Form 4 filing lists this figure as his total common share holdings following completion of the 700-share acquisition.

Is the Horizon Kinetics (HKHC) insider trade a buy or sell?

The Horizon Kinetics insider trade is a buy. Director Brent D. Rosenthal executed an open-market purchase of 700 common shares at $27.85 each, increasing his directly held position to a total of 2,450 common shares after the transaction.