Herndon Mark insider trades
Herndon Mark has filed 7 Form 4s with the SEC that we hold, for Horizon Kinetics Holding Corp (HKHC) (Chief Financial Officer) and Safeguard Scientifics INC (SFE) (SVP & Chief Financial Officer). Across all of them we count 6 purchases worth $15.8K and 0 sales worth $0 reported on Form 4. In the last 12 months: 5 purchases ($15.0K) and 0 sales ($0). The largest single trade was a purchase of 200 shares of Horizon Kinetics Holding Corp worth $5.3K, dated 2026-08-20. The first filing on our record is dated 2022-01-18 and the latest 2026-08-20.
Horizon Kinetics Holding Corp (HKHC)
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2025-06-04 | P, purchase reported on Form 4 | 20 | $804 | 2025-06-05 |
| 2025-11-20 | P, purchase reported on Form 4 | 100 | $2.9K | 2025-11-21 |
| 2026-03-18 | P, purchase reported on Form 4 | 80 | $2.6K | 2026-03-19 |
| 2026-05-20 | P, purchase reported on Form 4 | 100 | $2.8K | 2026-05-21 |
| 2026-08-19 | P, purchase reported on Form 4 | 50 | $1.3K | 2026-08-20 |
| 2026-08-20 | P, purchase reported on Form 4 | 200 | $5.3K | 2026-08-20 |
Safeguard Scientifics INC (SFE)
No purchase or sale of common stock reported here; these filings cover grants, option exercises or other codes.
Counted from the Form 4 filings this reporting owner (SEC CIK 1754318) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.
Source: U.S. Securities and Exchange Commission (EDGAR) and other official
government data · Updated 2026-10-12 ·
For informational purposes only, not investment advice.
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