Mark Herndon, Chief Financial Officer at Horizon Kinetics, bought HKHC on Aug 19, 2026
Data as of Oct 16
- Traded
- Aug 19, 2026
- Disclosed
- Aug 20, 2026
- Filed
- 1 day after the trade
Form 4s are due within two business days.
Official filing (SEC Form 4) ↗
The price around the disclosure
HKHC since disclosure
−22.9%
Similar stocks (XLF) since disclosure
−2.5%
XLF — its sector index fund
Change in closing price from Aug 20, 2026 (the first trading day on or after disclosure) to Oct 16, 2026. Dividends excluded. Not a return anyone earned.
Our take
None of our tested rules fired on this trade.
Other trades in the same filing
- ▲ BUYMark Herndon Chief Financial OfficerHKHC Horizon Kinetics Holding Corp$5.3Kdisclosed Aug 20 · filed the same day