Mark Herndon

Currently holds a position at Safeguard Scientifics Inc

2.3

2.3

Position	Company	Period
Chief Financial Officer, Senior Vice President	Safeguard Scientifics Inc	Sept. 21, 2018 -

• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings

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Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other

Notification date	Transaction date	Company	B/S Transaction type	Nb. shares Price Value	Number of shares	Price	Value
2026-05-21	2026-05-20	Horizon Kinetics Holding Corp (HKHC)	B Purchase	72,024 -46.8% 63.40 US$2,035,178	72,024 -46.8%	63.40	US$2,035,178
2026-03-19	2026-03-18	Horizon Kinetics Holding Corp (HKHC)	B Purchase	72,018 -1.3% 178.71 US$2,236,509	72,018 -1.3%	178.71	US$2,236,509
2025-11-21	2025-11-20	Horizon Kinetics Holding Corp (HKHC)	B Purchase	9,114 -27.1% 441.22 US$4,586,741	9,114 -27.1%	441.22	US$4,586,741
2025-06-05	2025-06-04	Horizon Kinetics Holding Corp (HKHC)	B Purchase	20 +inf% 40.18 US$804	20 +inf%	40.18	US$804
2020-05-07	2020-05-06	Safeguard Scientifics Inc (SFE)	B Purchase	2,000 +7.1% 6.25 US$12,500	2,000 +7.1%	6.25	US$12,500