Mark Herndon

Companies

• Horizon Kinetics Holding CorpChief financial officer Aug 9, 2024 to now¹
• SAFEGUARD SCIENTIFICS INCChief financial officer Sep 28, 2018 to Jan 19, 2023²

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• SSSAFEGUARD SCIENTIFICS INC SFES57,469 shares³$27.0K at $0.47Jan 17, 2023
• HKHorizon Kinetics Holding Corp HKHC550 shares⁴$11.3K at $20.50Aug 20, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Aug 20, 2026Bought 200 shares at $26.75 of Horizon Kinetics Holding Corp⁴
• Aug 19, 2026Bought 50 shares at $26.50 of Horizon Kinetics Holding Corp⁴
• May 20, 2026Bought 100 shares at $27.85 of Horizon Kinetics Holding Corp⁵
• Mar 18, 2026Bought 80 shares at $33.03 of Horizon Kinetics Holding Corp⁶
• Nov 20, 2025Bought 100 shares at $29.00 of Horizon Kinetics Holding Corp⁷
• Jun 4, 2025Bought 20 shares at $40.18 of Horizon Kinetics Holding Corp⁸
• Jan 17, 2023Shares withheld for tax 13,156 shares at $3.13 of SAFEGUARD SCIENTIFICS INC³
• Jan 17, 2023Granted 26,835 shares of SAFEGUARD SCIENTIFICS INC³
• Jan 17, 2022Shares withheld for tax 5,348 shares at $7.10 of SAFEGUARD SCIENTIFICS INC⁹
• Jan 17, 2022Granted 11,526 shares of SAFEGUARD SCIENTIFICS INC⁹