Herndon Mark
- SEC CIK
- 0001754318
Latest role at each company
- HKHC Horizon Kinetics Holding CorpChief Financial Officeras of Aug 20, 2026
- SFES SAFEGUARD SCIENTIFICS INCSVP & Chief Financial Officeras of Jan 19, 2023
Trades
Every Form 4 that lists Herndon Mark as a reporting owner, including filings made jointly with others. Each row adds up one type of transaction in one filing. Only open-market purchases (P) and sales (S) are shown by default.
| Company | Filed (ET) | Trade date | Insider | Transaction | Shares | Avg price | Value | Shares after | Holding change | Filing |
|---|---|---|---|---|---|---|---|---|---|---|
| HKHCHorizon Kinetics Holding Corp | Aug 20, 20262:08 PM ET | Aug 19 – Aug 20, 2026 | Herndon MarkChief Financial Officer | PPurchaseCommon Stock | +250 | $26.70 | +$6.68K | 550 | +83.3% | SEC |
| HKHCHorizon Kinetics Holding Corp | May 21, 2026 | May 20, 2026 | Herndon MarkChief Financial Officer | PPurchaseCommon Stock | +100 | $27.85 | +$2.79K | 300 | +50.0% | SEC |
| HKHCHorizon Kinetics Holding Corp | Mar 19, 2026 | Mar 18, 2026 | Herndon MarkChief Financial Officer | PPurchaseCommon Stock | +80 | $33.03 | +$2.64K | 200 | +66.7% | SEC |
| HKHCHorizon Kinetics Holding Corp | Nov 21, 2025 | Nov 20, 2025 | Herndon MarkChief Financial Officer | PPurchaseCommon Stock | +100 | $29.00 | +$2.9K | 120 | +500.0% | SEC |
| HKHCHorizon Kinetics Holding Corp | Jun 5, 2025 | Jun 4, 2025 | Herndon MarkChief Financial Officer | PPurchaseCommon Stock | +20 | $40.18 | +$803.6 | 20 | New position | SEC |