X0508 4 2025-05-27 0000088000 Horizon Kinetics Holding Corp HKHC 0001207097 STAHL MURRAY 470 PARK AVENUE SOUTH 8TH FLOOR SOUTH NEW YORK NY 10016 1 1 1 CEO and CIO 0002033370 Horizon Common Inc 470 PARK AVENUE SOUTH 8TH FLOOR SOUTH NEW YORK NY 10016 1 0 Common Stock 2025-05-27 4 P 0 8 42 A 248777 D Common Stock 2025-05-27 4 P 0 2 42 A 8216541 I Horizon Common Inc. Common Stock 5 I Spouse Common Stock 823863 I FRMO Corp. Common Stock 6900 I Kinetics Institutional Partners LP Common Stock 5810 I Kinetics Partners LP Common Stock 951 I Horizon Kinetics Asset Management LLC Mr. Stahl received 248,460 shares on August 1, 2024 in connection with the merger between Horizon Kinetics LLC and Scotts Liquid Gold-Inc. Horizon Common Inc. received 8,214,337 shares in connection with the merger between Horizon Kinetics LLC and Scott's Liquid Gold-Inc. Mr. Stahl exercises discretion over the shares of the Issuer and owns approximately 21% of those held by Horizon Common Inc. He disclaims beneficial ownership over the remaining shares. FRMO Corp. received 823,863 shares in connection with the merger between Horizon Kinetics LLC and Scotts Liquid Gold-Inc. Mr. Stahl exercises discretion over the shares of the Issuer and owns approximately 16% of those held by FRMO Corp. He disclaims beneficial ownership over the remaining shares. Mr. Stahl exercises discretion over shares of the Issuer and disclaims beneficial ownership except to the extent of his pecuniary interest. /s/ Jay Kesslen, attorney-in-fact 2025-05-28