HKHC insider buying
10 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
- Aug 19 – Sep 2, 2026Detected Sep 3, 2026High conviction4 insidersTotal bought$100.3KMarket capUnknown
- Aug 19 – Aug 28, 2026Detected Aug 31, 2026High conviction4 insidersTotal bought$95.1KMarket capUnknown
- Aug 19 – Aug 27, 2026Detected Aug 28, 2026High conviction4 insidersTotal bought$89.8KMarket capUnknown
7 more clusters in HKHC
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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 |
|---|---|---|---|---|---|
| Sep 2, 2026 | Brennan Alice Ccluster Director | 200 | $25.92 | $5.2K | SEC ↗ |
| Aug 28, 2026 | Brennan Alice Ccluster Director | 200 | $26.20 | $5.2K | SEC ↗ |
| Aug 27, 2026 | Brennan Alice Ccluster Director | 200 | $26.00 | $5.2K | SEC ↗ |
| Aug 26, 2026 | Roller Daniel Jcluster Director | 500 | $26.50 | $13.3K | SEC ↗ |
| Aug 25, 2026 | Brennan Alice Ccluster Director | 200 | $26.75 | $5.4K | SEC ↗ |
| Aug 24, 2026 | Rosenthal Brent Dcluster Director | 2,000 | $27.00 | $54.0K | SEC ↗ |
| Aug 24, 2026 | Brennan Alice Ccluster Director | 200 | $26.87 | $5.4K | SEC ↗ |
| Aug 20, 2026 | Herndon Markcluster Chief Financial Officer | 200 | $26.75 | $5.4K | SEC ↗ |
| Aug 19, 2026 | Herndon Markcluster Chief Financial Officer | 50 | $26.50 | $1.3K | SEC ↗ |
| 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 ↗ |
HKHC insider buying — FAQ
- Are insiders buying HKHC stock?
- Yes — 14 distinct insiders have bought HKHC (Horizon Kinetics Holding Corp) on the open market, including 10 cluster buys where two or more insiders bought within a rolling window. The most recent qualifying activity was Sep 3, 2026.
- How much HKHC stock have insiders bought?
- Insiders have bought a combined $265.9K of HKHC across 216 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 10 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.