HKHC
insider transactionsHorizon Kinetics Holding Corp — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Cluster buy signal: Multiple insiders at the same company buying around the same time — often a stronger signal than a single buy. 4 different insiders made open-market purchases in the last 365 days, totalling $62.4K.
Net shares · 365d
+2.0K
2.0K buy · 0 sell
Net value · 365d
$62.4K
$62.4K in · $0 out
Sentiment · 365d
Net buying
100% buying · 0% selling
Open-market trades · 365d
17
2.0K buy · 0 sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
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Buy·P
Director
$19.5K
700 sh · $27.85
Own +40%
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Buy·P
Mark Herndon KEY
Chief Financial Officer
$2.8K
100 sh · $27.85
Own +50%
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Buy·P
Director
$5.1K
150 sh · $33.96
Own +60%
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Buy·P
Murray Stahl / Horizon Common Inc KEY
CEO and CIO
$623
18 sh · $34.60
Own +15%
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Buy·P
Murray Stahl / Horizon Common Inc KEY
CEO and CIO
$865
25 sh · $34.60
Own +0%
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Buy·P
Murray Stahl / Horizon Common Inc KEY
CEO and CIO
$346
10 sh · $34.60
Own +0%
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Buy·P
Murray Stahl / Horizon Common Inc KEY
CEO and CIO
$623
18 sh · $34.60
Own +15%
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Buy·P
Murray Stahl / Horizon Common Inc KEY
CEO and CIO
$865
25 sh · $34.60
Own +0%
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Buy·P
Murray Stahl / Horizon Common Inc KEY
CEO and CIO
$346
10 sh · $34.60
Own +0%
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Buy·P
Murray Stahl / Horizon Common Inc KEY
CEO and CIO
$613
18 sh · $34.06
Own +18%
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Buy·P
Murray Stahl / Horizon Common Inc KEY
CEO and CIO
$852
25 sh · $34.06
Own +0%
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Buy·P
Murray Stahl / Horizon Common Inc KEY
CEO and CIO
$1.6K
46 sh · $34.06
Own +0%
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Buy·P
Director
$24.8K
750 sh · $33.05
Own +75%
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Buy·P
Murray Stahl / Horizon Common Inc KEY
CEO and CIO
$272
8 sh · $34.00
Own +9%
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Buy·P
Murray Stahl / Horizon Common Inc KEY
CEO and CIO
$306
9 sh · $34.00
Own +0%
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Buy·P
Murray Stahl / Horizon Common Inc KEY
CEO and CIO
$340
10 sh · $34.00
Own +0%
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Buy·P
Mark Herndon KEY
Chief Financial Officer
$2.6K
80 sh · $33.03
Own +67%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| May 20, 2026 | Brent D Rosenthal | Buy P | 700 | $19.5K |
| May 20, 2026 | Mark Herndon KEY | Buy P | 100 | $2.8K |
| Mar 20, 2026 | Allison Nagelberg | Buy P | 150 | $5.1K |
| Mar 20, 2026 | Murray Stahl / Horizon Common Inc KEY | Buy P | 18 | $623 |
| Mar 20, 2026 | Murray Stahl / Horizon Common Inc KEY | Buy P | 25 | $865 |
| Mar 20, 2026 | Murray Stahl / Horizon Common Inc KEY | Buy P | 10 | $346 |
| Mar 20, 2026 | Murray Stahl / Horizon Common Inc KEY | Buy P | 18 | $623 |
| Mar 20, 2026 | Murray Stahl / Horizon Common Inc KEY | Buy P | 25 | $865 |
| Mar 20, 2026 | Murray Stahl / Horizon Common Inc KEY | Buy P | 10 | $346 |
| Mar 19, 2026 | Murray Stahl / Horizon Common Inc KEY | Buy P | 18 | $613 |
| Mar 19, 2026 | Murray Stahl / Horizon Common Inc KEY | Buy P | 25 | $852 |
| Mar 19, 2026 | Murray Stahl / Horizon Common Inc KEY | Buy P | 46 | $1.6K |
| Mar 18, 2026 | Brent D Rosenthal | Buy P | 750 | $24.8K |
| Mar 18, 2026 | Murray Stahl / Horizon Common Inc KEY | Buy P | 8 | $272 |
| Mar 18, 2026 | Murray Stahl / Horizon Common Inc KEY | Buy P | 9 | $306 |
| Mar 18, 2026 | Murray Stahl / Horizon Common Inc KEY | Buy P | 10 | $340 |
| Mar 18, 2026 | Mark Herndon KEY | Buy P | 80 | $2.6K |
About HKHC insider trading
This page tracks insider transactions for Horizon Kinetics Holding Corp (HKHC) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.