Machine signal
Active cluster buy — 5 distinct insiders, $105.3K, window ends Sep 18, 2026.
Figures computed from official regulatory filings — .
Ownershipinsiders 56.26% · institutions 7.04%
In USD · as of Oct 5, 2026
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Horizon Kinetics Holding Corporation is an employee owned investment manager. The firm primarily provides its services to high net worth individuals. It also caters to individuals, investment companies, pension and profit sharing plans, pooled investment vehicles, charitable organizations, and corporations. The firm manages separate client-focused equity and fixed income portfolios. It also manages equity mutual fund for its clients. The firm invests in the public equity, fixed income, and alternative markets across the globe. It typically invests in value stocks of small cap and large cap companies. The firm employs a fundamental analysis to create its portfolios. It conducts in-house research to make its investments. Horizon Kinetics Holding Corporation was founded in 1994 and is based in New York City with additional offices in Charlotte, North Carolina; Summit, New Jersey and White Plains, New York.
Market information source · Oct 5, 2026
Periods recorded in the consulted sources. These do not certify the legal dates of name changes.
SEC company identity · Oct 5, 2026
Open-market timeline · full history
262 buys18 sells— close pricebar = usd volume, √ scaleclick a period to filter the table
| Insider | Type | Value · USD | Signals | Details |
|---|---|---|---|---|
| Nagelberg Allisontrack record | Buy | $5K | conv 55 |
| SEC |
| Brennan Alice Ctrack record | Buy | $5.2K | conv 45Cluster | SEC |
| Brennan Alice Ctrack record | Buy | $5.2K | conv 45Cluster | SEC |
| Brennan Alice Ctrack record | Buy | $5.2K | conv 46Cluster | SEC |
| Roller Daniel J | Buy | $13.3K | conv 59ClusterFirst in 12mo | SEC |
| Brennan Alice Ctrack record | Buy | $5.4K | conv 46Cluster | SEC |
| Rosenthal Brent Davidtrack record | Buy | $54K | conv 67Cluster | SEC |
| Brennan Alice Ctrack record | Buy | $5.4K | conv 52Cluster | SEC |
| Herndon Marktrack record | Buy | $5.4K | conv 52 | SEC |
| Herndon Marktrack record | Buy | $1.3K | conv 33 | SEC |
| Herndon Marktrack record | Buy | $2.8K | conv 61Cluster | SEC |
| Rosenthal Brent Davidtrack record | Buy | $19.5K | conv 50Cluster | SEC |
| STAHL MURRAYtrack record | Buy | $865 | conv 25Cluster | SEC |
| STAHL MURRAYtrack record | Buy | $622.8 | conv 25Cluster | SEC |
| STAHL MURRAYtrack record | Buy | $346 | conv 20Cluster | SEC |
| Nagelberg Allisontrack record | Buy | $5.1K | conv 56ClusterFirst in 12mo | SEC |
| Horizon Common Inctrack record | Buy | $613.1 | conv 54ClusterUnusual size | SEC |
| Horizon Common Inctrack record | Buy | $851.5 | conv 50ClusterUnusual size | SEC |
| Horizon Common Inctrack record | Buy | $1.6K | conv 50ClusterUnusual size | SEC |
| Horizon Common Inctrack record | Buy | $306 | conv 39Cluster | SEC |
| Horizon Common Inctrack record | Buy | $340 | conv 41Cluster | SEC |
| Herndon Marktrack record | Buy | $2.6K | conv 58Cluster | SEC |
| Horizon Common Inctrack record | Buy | $272 | conv 39Cluster | SEC |
| Rosenthal Brent Davidtrack record | Buy | $24.8K | conv 50Cluster | SEC |
| Maran Partners Fund, LP | Other | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |