Herndon Mark
- SEC CIK
- 0001754318
In the past year, 4 open-market purchase filings worth $15.0K and no sales.
Current role at each company
- HKHC Horizon Kinetics Holding CorpChief Financial Officeras of Aug 20, 2026
- SFES Safeguard Scientifics IncSVP & Chief Financial Officeras of Jan 19, 2023
Open-market trades in the past year
Open-market purchases (P) and sales (S) filed in the last 365 days, not counting derivative securities or duplicate filings. Values leave out price outliers.
- Bought
- $15.0K
- 4 filings
- Sold
- –
- 0 filings
- Net
- +$15.0K
- Bought minus sold
- Companies
- 1
- With open-market trades
Trades
Every Form 4 that lists Herndon Mark as a reporting owner, including filings made jointly with others, grouped by company. Each row adds up one type of transaction in one filing. Only open-market purchases (P) and sales (S) are shown by default.
HKHC Horizon Kinetics Holding Corp
Chief Financial Officer5 trades
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Jun 5, 2025 (view filing) | Jun 4 | 1 day | Herndon MarkChief Financial Officer | PPurchase | +20 | $40.18 | +$803.6 | New position20 after | |
| Nov 21, 2025 (view filing) | Nov 20 | 1 day | Herndon MarkChief Financial Officer | PPurchase | +100 | $29.00 | +$2.90K | +500.0%120 after | |
| Mar 19, 2026 (view filing) | Mar 18 | 1 day | Herndon MarkChief Financial Officer | PPurchase | +80 | $33.03 | +$2.64K | +66.7%200 after | |
| May 21, 2026 (view filing) | May 20 | 1 day | Herndon MarkChief Financial Officer | PPurchase | +100 | $27.85 | +$2.79K | +50.0%300 after | |
| Aug 20, 2026 (view filing)2:08 PM ET | Aug 19-20 | 1 day | Herndon MarkChief Financial Officer | PPurchase | +250 | $26.70 | +$6.67K | +83.3%550 after | 2 lots |