Form4.ai tracks every SEC insider trade in real time. See every HKHC insider filing with a free account — no card.
See every HKHC insider filing — free account, no card.
Free accountHorizon Kinetics Holding Corp (HKHC) has 9 SEC Form 4 insider filings on record in the last 90 days. That includes 9 insider purchases totalling $105K. Most recent filing: Sept. 22, 2026.
Open-market value, last 90 days
Form 4 filings by type, last 90 days
| Date | Insider | Trade | Value | Price since buy |
|---|---|---|---|---|
| Sep 22, 2026 SEC filing | Nagelberg Allison Director | Bought | $4,991 | -23.9% 30D |
| Sep 3, 2026 SEC filing | Brennan Alice C Director | Bought | $5,184 | -12.0% 30D |
| Aug 31, 2026 SEC filing | Brennan Alice C Director | Bought | $5,240 | -12.5% 30D |
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Form 4 is the filing company officers, directors and 10% shareholders must submit to the SEC within two business days of trading their own company's stock. Open-market purchases generally carry more signal than sales, which are often scheduled in advance. More on how this works.