Insider · CIK 0001754318
Mark Herndon
Files at: HKHC, SFE. On EDGAR ↗
Reported trades — common stock
| Trade | Reported (ET) | Company | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Aug 19, 2026 PForm 4 → | Aug 20, 2:08 pm EDT | Horizon Kinetics Holding CorpHKHC | 250 | $26.70 | $6,675 | 550 | +83.3% |
Reported trades — derivatives (options, RSUs, warrants)
No reported derivative activity in this period.