🕵️ Horizon Kinetics Holding Corp ($HKHC)
SEC insider & ownership activity, last 12 months · CIK 88000 · every row links its SEC filing
Over the last 12 months insiders bought $181K with no open-market selling against it. Brent D. Rosenthal bought $106K (Nov–Aug). No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
6 buyers, $181K (67 lots) · 0 sellers, $0 (0 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Brent D. Rosenthal | 4 | $106K | 0 | – | Aug 24, 2026 |
| Alice C. Brennan | 5 | $26K | 0 | – | Sep 2, 2026 |
| Herndon Mark | 5 | $15K | 0 | – | Aug 20, 2026 |
| Stahl Murray | 51 | $15K | 0 | – | Mar 20, 2026 |
| Daniel J. Roller | 1 | $13K | 0 | – | Aug 26, 2026 |
| Nagelberg Allison | 1 | $5K | 0 | – | Mar 20, 2026 |
5%+ holders
No current 5%+ beneficial-ownership positions on file.
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Earnings (2.02) | Aug 13, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 13, 2026 | filing ↗ |
| Earnings (2.02) | May 15, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 15, 2026 | filing ↗ |
| Material agreement (1.01) | May 5, 2026 | filing ↗ |
| Officer/director changes (5.02) | Apr 7, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 7, 2026 | filing ↗ |
| Earnings (2.02) | Mar 12, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 12, 2026 | filing ↗ |
| Earnings (2.02) | Nov 13, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 13, 2025 | filing ↗ |