Horizon Kinetics Holding Corp (HKHC) Insider Trading & SEC Filings

Updated Jul 16, 2026 · Last SEC filing 2026-05-21

Horizon Kinetics Holding Corp (HKHC) has filed 2 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-05-21. 2 Form 8-K material event filings were reported by HKHC in the last 90 days. InsiderAlpha tracks every HKHC SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.

About Horizon Kinetics Holding Corp (HKHC)

SIC classificationInvestment Advice (SIC 6282)
SEC CIK0000088000

90-Day SEC Filing Activity

Form 4 filings (90d)2
Form 8-K filings (90d)2
Latest Form 4 filing2026-05-21

Recent HKHC Insider Transactions (Form 4)

DateInsiderRoleTransactionSharesPriceValueFiling
Herndon MarkChief Financial OfficerP — Open-market purchase100$27.85$3KSEC
Rosenthal Brent DDirectorP — Open-market purchase700$27.85$19KSEC
Nagelberg AllisonDirectorP — Open-market purchase150$33.96$5KSEC
STAHL MURRAYCEO and CIOP — Open-market purchase10$34.60$346SEC
STAHL MURRAYCEO and CIOP — Open-market purchase18$34.60$623SEC
STAHL MURRAYCEO and CIOP — Open-market purchase25$34.60$865SEC
STAHL MURRAYCEO and CIOP — Open-market purchase18$34.06$613SEC
STAHL MURRAYCEO and CIOP — Open-market purchase46$34.06$2KSEC
STAHL MURRAYCEO and CIOP — Open-market purchase25$34.06$852SEC
STAHL MURRAYCEO and CIOP — Open-market purchase10$34.00$340SEC
STAHL MURRAYCEO and CIOP — Open-market purchase9$34.00$306SEC
STAHL MURRAYCEO and CIOP — Open-market purchase8$34.00$272SEC
Rosenthal Brent DDirectorP — Open-market purchase750$33.05$25KSEC
Herndon MarkChief Financial OfficerP — Open-market purchase80$33.03$3KSEC
STAHL MURRAYCEO and CIOP — Open-market purchase6$27.75$166SEC

All transactions sourced from SEC EDGAR Form 4 filings for Horizon Kinetics Holding Corp (HKHC). Updated in real time as new filings are submitted to the SEC.

Most-Active HKHC Insiders — Last 90 Days

InsiderForm 4 filingsTotal transaction value
Rosenthal Brent D1$19K
Herndon Mark1$3K

Recent HKHC Form 8-K Material Events

Recent Insider Filings

Form 4 Transaction Code Reference

SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in HKHC insider filings:

POpen-market purchase by the insider
SOpen-market sale by the insider
AGrant, award, or other acquisition from the issuer
MExercise or conversion of derivative security (e.g. options)
FPayment of exercise price or tax liability via share withholding
GBona-fide gift of securities
DDisposition to the issuer (e.g. share buyback participation)
JOther acquisition or disposition
XExercise of in-the-money or at-the-money derivative security
CConversion of derivative security
VTransaction voluntarily reported earlier than required

HKHC Insider Trading — FAQ

What is the latest insider trade for HKHC?
Horizon Kinetics Holding Corp (HKHC) had 2 insider filings in the last 90 days, with the most recent on 2026-05-21. InsiderAlpha tracks every Form 4, 10-K, 10-Q, and 8-K filing in real time.
How many insiders are buying HKHC stock?
0 insider purchases of HKHC were filed in the last 90 days.
How many insiders are selling HKHC stock?
0 insider sales of HKHC were filed in the last 90 days.
Where can I see HKHC SEC filings (Form 4, 10-K, 10-Q, 8-K)?
InsiderAlpha aggregates every HKHC SEC filing — Form 4 insider transactions, 10-K and 10-Q quarterly reports, and 8-K material event disclosures — in one timeline.

Related Companies — Recent Insider Activity

Learn More

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