HERNDON MARK

PrivateCIK: 1754318
Location

RADNOR, PA

HERNDON MARK (Chief Financial Officer) purchased 50.0% of their position (100.00 shares) of HORIZON KINETICS HOLDING CORP on the open market

Open‑market purchase worth $2.8K — a major conviction buy. The strongest form of insider conviction signal.

P · 1 purchase
InsiderHERNDON MARKCIK 1754318
Officer· Chief Financial Officer
Since Aug 2024
+100.00
Net shares
Net buyer
$2.8K
Total acquired
1
Open market trades
1B · 0S
1
Total transactions
100.00 acquired
Non-Derivative Transactions1

Common Stock

Direct
P · Purchase

Shares

+100.00

Price / share

$27.85

Trade value

$2.79K

% of position

50.0%
5/20/2026
200.00300.00
Total

Net shares

+100.00

Net value

$2.79K

Derivative Transactions0
No derivative transactions reported
HERNDON MARK — Insider Transaction (Form 4) Filed May 21, 2026 | Finecho