HKHC insider buying
3 cluster buysHorizon Kinetics Holding Corp
When two or more insiders at Horizon Kinetics Holding Corp buy HKHC on the open market around the same time, that clustered conviction is one of the highest-signal patterns in SEC filing data. Below is every cluster we've detected in HKHC plus the full record of qualifying open-market buys, each parsed directly from Form 4 filings and linked back to the source on SEC EDGAR.
Detected clusters
- Mar 18 – Mar 20, 2026Detected Mar 20, 2026High conviction4 insidersTotal bought$38.3KMarket capUnknown
- May 21 – Dec 10, 2025Detected Dec 10, 2025High conviction5 insidersTotal bought$53.5KMarket capUnknown
- Aug 2 – Dec 9, 2024Detected Dec 9, 2024High conviction9 insidersTotal bought$73.8KMarket capUnknown
All notable open-market buys in HKHC
Every open-market Form 4 purchase, newest first. Click an insider to see their full buying record across companies.
| Date | Insider | Shares | Price | Value | Filing |
|---|---|---|---|---|---|
| Mar 20, 2026 | Nagelberg Allisoncluster Director | 150 | $33.96 | $5.1K | SEC ↗ |
| Mar 20, 2026 | Horizon Common Inccluster 10% Owner | 25 | $34.60 | $865.0 | SEC ↗ |
| Mar 20, 2026 | Horizon Common Inccluster 10% Owner | 18 | $34.60 | $622.8 | SEC ↗ |
| Mar 20, 2026 | Horizon Common Inccluster 10% Owner | 10 | $34.60 | $346.0 | SEC ↗ |
| Mar 19, 2026 | Horizon Common Inccluster 10% Owner | 46 | $34.06 | $1.6K | SEC ↗ |
| Mar 19, 2026 | Horizon Common Inccluster 10% Owner | 25 | $34.06 | $851.5 | SEC ↗ |
| Mar 19, 2026 | Horizon Common Inccluster 10% Owner | 18 | $34.06 | $613.1 | SEC ↗ |
| Mar 18, 2026 | Rosenthal Brent Dcluster Director | 750 | $33.05 | $24.8K | SEC ↗ |
| Mar 18, 2026 | Herndon Markcluster Chief Financial Officer | 80 | $33.03 | $2.6K | SEC ↗ |
| Mar 18, 2026 | Horizon Common Inccluster 10% Owner | 10 | $34.00 | $340.0 | SEC ↗ |
| Mar 18, 2026 | Horizon Common Inccluster 10% Owner | 9 | $34.00 | $306.0 | SEC ↗ |
| Mar 18, 2026 | Horizon Common Inccluster 10% Owner | 8 | $34.00 | $272.0 | SEC ↗ |
| Dec 10, 2025 | STAHL MURRAYcluster Director, CEO and CIO, 10% Owner | 12 | $27.00 | $324.0 | SEC ↗ |
| Dec 10, 2025 | STAHL MURRAYcluster Director, CEO and CIO, 10% Owner | 6 | $27.00 | $162.0 | SEC ↗ |
| Dec 10, 2025 | STAHL MURRAYcluster Director, CEO and CIO, 10% Owner | 4 | $27.00 | $108.0 | SEC ↗ |
| Dec 9, 2025 | STAHL MURRAYcluster Director, CEO and CIO, 10% Owner | 12 | $27.00 | $324.0 | SEC ↗ |
| Dec 9, 2025 | STAHL MURRAYcluster Director, CEO and CIO, 10% Owner | 6 | $27.00 | $162.0 | SEC ↗ |
| Dec 9, 2025 | STAHL MURRAYcluster Director, CEO and CIO, 10% Owner | 4 | $27.00 | $108.0 | SEC ↗ |
| Dec 8, 2025 | Horizon Common Inccluster 10% Owner | 12 | $26.73 | $320.8 | SEC ↗ |
| Dec 8, 2025 | Horizon Common Inccluster 10% Owner | 6 | $26.73 | $160.4 | SEC ↗ |
| Dec 8, 2025 | Horizon Common Inccluster 10% Owner | 4 | $26.73 | $106.9 | SEC ↗ |
| Dec 5, 2025 | STAHL MURRAYcluster Director, CEO and CIO, 10% Owner | 12 | $27.75 | $333.0 | SEC ↗ |
| Dec 5, 2025 | STAHL MURRAYcluster Director, CEO and CIO, 10% Owner | 6 | $27.75 | $166.5 | SEC ↗ |
| Dec 5, 2025 | STAHL MURRAYcluster Director, CEO and CIO, 10% Owner | 4 | $27.75 | $111.0 | SEC ↗ |
| Dec 4, 2025 | Horizon Common Inccluster 10% Owner | 12 | $27.75 | $333.0 | SEC ↗ |
HKHC insider buying — FAQ
- Are insiders buying HKHC stock?
- Yes — 10 distinct insiders have bought HKHC (Horizon Kinetics Holding Corp) on the open market, including 3 cluster buys where two or more insiders bought within a rolling window. The most recent qualifying activity was Mar 24, 2026.
- How much HKHC stock have insiders bought?
- Insiders have bought a combined $165.6K of HKHC across 207 open-market purchases, based on SEC Form 4 filings.
- What is an insider cluster buy in HKHC?
- A cluster buy is two or more distinct Horizon Kinetics Holding Corp insiders — officers, directors, or 10% owners — each buying HKHC on the open market within a rolling window. HKHC has 3 detected cluster buys to date.
- Where does this HKHC insider trading data come from?
- Every figure is parsed directly from SEC Form 4 filings on EDGAR, and each purchase on this page links back to its original filing document.
How we track insider buying in HKHC
We continuously poll SEC EDGAR for new Form 4 filings and parse every open-market purchase (transaction code P). A cluster is recorded when two or more distinct insiders — officers, directors, or 10% owners — each buy HKHC within a rolling window. We track clusters at every company size, from micro-caps to mega-caps. Every figure on this page traces back to an official filing; open any row to jump straight to the source document. What counts as a cluster buy?
This page is informational and reflects public filing data. It is not investment advice or a recommendation regarding HKHC.