Form4insider filings, from the source

Company · CIK 0000088000 · SIC 6282 — Investment Advice · OTC

Horizon Kinetics Holding Corp · HKHC

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $105k · 9sales $0 · 0net $105k
$10k$10k$100k$100k$1M$1MbuyssalesSep 2024Jan 2025May 2025Sep 2025Jan 2026May 2026Sep 2026

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Sep 18, 2026 PForm 4 →Sep 22, 9:28 am EDTAllison NagelbergDirector190$26.27$4,991590+47.5%
Sep 2, 2026 PForm 4 →Sep 3, 8:28 am EDTAlice C BrennanDirector200$25.92$5,1842,000+11.1%
Aug 28, 2026 PForm 4 →Aug 31, 9:30 am EDTAlice C BrennanDirector200$26.20$5,2401,800+12.5%
Aug 27, 2026 PForm 4 →Aug 28, 2:16 pm EDTAlice C BrennanDirector200$26.00$5,2001,600+14.3%
Aug 26, 2026 PForm 4 →Aug 27, 1:30 pm EDTDaniel J Roller +3Director500$26.50$13,25010,000+5.26%
Aug 25, 2026 PForm 4 →Aug 26, 11:15 am EDTAlice C BrennanDirector200$26.75$5,3501,400+16.7%
Aug 24, 2026 PForm 4 →Aug 25, 11:50 am EDTAlice C BrennanDirector200$26.87$5,3741,200+20.0%
Aug 24, 2026 PForm 4 →Aug 25, 10:11 am EDTBrent D RosenthalDirector2,000$27.00$54,0004,450+81.6%
Aug 19, 2026 PForm 4 →Aug 20, 2:08 pm EDTMark HerndonChief Financial Officer250$26.70$6,675550+83.3%

Reported at this company — derivatives (options, RSUs, warrants)

No reported derivative activity in this period.