Horizon Kinetics Holding Corp Insider Trading Activity
Every SEC Form 4 insider transaction reported for Horizon Kinetics Holding Corp (HKHC), sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud · Insider-trading data from SEC EDGAR
Latest filing:
Compiled automatically from SEC EDGAR Form 4 filings and refreshed daily. Figures count purchases (code P) and sales (code S) only — not grants, option exercises, or gifts. How this page is built. Not investment advice.
Quick Answer
Are HKHC insiders buying or selling?
In the last 12 months, Horizon Kinetics Holding Corp insiders reported 34 open-market purchases ($187.5K) and 0 sales ($0) — net buying of $187.5K. Since February 2018, Trabud has recorded 112 Form 4 filings for HKHC: 108 buys ($2.4M) and 4 sells ($1.6M).
Source: SEC EDGAR Form 4
What stands out
- The largest open-market purchase in the last 12 months was $54.0K by Brent D Rosenthal (Director) on Aug 25, 2026. SEC ↗
- 5 different insiders made open-market purchases of HKHC in the last 90 days, totaling $105.3K.
- The most recent open-market purchase was reported on Sep 22, 2026 (27 days ago).
Key Statistics (February 2018 – Sep 22, 2026)
Total Form 4 filings
112
SEC EDGAR
Insider filers
14
Insider buys (108)
$2.4M
Insider sells (4)
$1.6M
Insider sentiment
Net buyingNet insider flow of $857.1K in net buying since February 2018, and $187.5K in net buying over the last 12 months. 9 insider buys in the last 90 days.
Recent HKHC insider transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Sep 22, 2026 | Allison Nagelberg | Director | Purchase | 190 | $26.27 | $5.0K | SEC ↗ |
| Sep 3, 2026 | Alice C Brennan | Director | Purchase | 200 | $25.92 | $5.2K | SEC ↗ |
| Aug 31, 2026 | Alice C Brennan | Director | Purchase | 200 | $26.20 | $5.2K | SEC ↗ |
| Aug 28, 2026 | Alice C Brennan | Director | Purchase | 200 | $26.00 | $5.2K | SEC ↗ |
| Aug 27, 2026 | Daniel J Roller | Director | Purchase | 500 | $26.50 | $13.3K | SEC ↗ |
| Aug 26, 2026 | Alice C Brennan | Director | Purchase | 200 | $26.75 | $5.3K | SEC ↗ |
| Aug 25, 2026 | Alice C Brennan | Director | Purchase | 200 | $26.87 | $5.4K | SEC ↗ |
| Aug 25, 2026 | Brent D Rosenthal | Director | Purchase | 2.0K | $27.00 | $54.0K | SEC ↗ |
| Aug 20, 2026 | Mark Herndon | Chief Financial Officer | Purchase | 250 | $26.70 | $6.7K | SEC ↗ |
| May 21, 2026 | Mark Herndon | Chief Financial Officer | Purchase | 100 | $27.85 | $2.8K | SEC ↗ |
| May 21, 2026 | Brent D Rosenthal | Director | Purchase | 700 | $27.85 | $19.5K | SEC ↗ |
| Mar 24, 2026 | Murray Stahl | CEO and CIO | Purchase | 53 | $34.60 | $1.8K | SEC ↗ |
| Mar 24, 2026 | Murray Stahl | CEO and CIO | Purchase | 53 | $34.60 | $1.8K | SEC ↗ |
| Mar 23, 2026 | Allison Nagelberg | Director | Purchase | 150 | $33.96 | $5.1K | SEC ↗ |
| Mar 20, 2026 | Murray Stahl | CEO and CIO | Purchase | 89 | $34.06 | $3.0K | SEC ↗ |
| Mar 19, 2026 | Murray Stahl | CEO and CIO | Purchase | 27 | $34.00 | $918 | SEC ↗ |
| Mar 19, 2026 | Mark Herndon | Chief Financial Officer | Purchase | 80 | $33.03 | $2.6K | SEC ↗ |
| Mar 19, 2026 | Brent D Rosenthal | Director | Purchase | 750 | $33.05 | $24.8K | SEC ↗ |
| Dec 11, 2025 | Murray Stahl | CEO and CIO | Purchase | 22 | $27.00 | $594 | SEC ↗ |
| Dec 10, 2025 | Murray Stahl | CEO and CIO | Purchase | 22 | $27.00 | $594 | SEC ↗ |
| Dec 9, 2025 | Murray Stahl | CEO and CIO | Purchase | 22 | $26.73 | $588.06 | SEC ↗ |
| Dec 8, 2025 | Murray Stahl | CEO and CIO | Purchase | 22 | $27.75 | $610.5 | SEC ↗ |
| Dec 5, 2025 | Murray Stahl | CEO and CIO | Purchase | 22 | $27.75 | $610.5 | SEC ↗ |
| Dec 4, 2025 | Murray Stahl | CEO and CIO | Purchase | 22 | $27.00 | $594 | SEC ↗ |
| Dec 3, 2025 | Murray Stahl | CEO and CIO | Purchase | 22 | $27.23 | $599.06 | SEC ↗ |
Showing the 25 most recent of 112 Form 4 filings for Horizon Kinetics Holding Corp.
Most active HKHC insiders
- Murray Stahl67 filings
- Alice C Brennan8 filings
- Brent D Rosenthal7 filings
- ISZO CAPITAL LP6 filings
- Mark Herndon5 filings
Ask anything about HKHC insider activity
Use Trabud's AI agent to query Horizon Kinetics Holding Corp's Form 4 history in plain English — "Show me HKHC CEO purchases this year" or compare it against any other ticker.
Open the AI agentHKHC insider trading FAQ
Are Horizon Kinetics Holding Corp insiders buying or selling?
In the last 12 months, Horizon Kinetics Holding Corp insiders reported 34 open-market purchases ($187.5K) and 0 sales ($0) — net buying of $187.5K. Since February 2018, Trabud has recorded 112 Form 4 filings for HKHC: 108 buys ($2.4M) and 4 sells ($1.6M). Over the full record that is net buying of $857.1K.
How many insiders trade HKHC stock?
14 distinct insider filers — officers, directors, 10%+ owners, and investment groups filing jointly — have reported Form 4 transactions for Horizon Kinetics Holding Corp. The most recent filing was accepted on Sep 22, 2026.
Where does Trabud get HKHC insider trading data?
All HKHC insider trading data comes directly from official SEC EDGAR Form 4 filings, which corporate insiders must submit within two business days of a transaction under Section 16(a) of the Securities Exchange Act of 1934.