Transaction · 0001437749-26-028880

Rosenthal Brent D

Rosenthal Brent D, DIR, reported an open-market or private purchase at Horizon Kinetics Holding Corp involving 2000.000000 shares for an estimated $54000.00. Reported holdings after the transaction were 4450.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

Open-market buySEC transaction code PDIR
HKHCHorizon Kinetics Holding Corp
Filing timeAug 25
Trade dateAug 24, 2026
Filing · SECView on SEC
InsiderProfile

Price performance since filing

Close on the filing date, the pre-filing context, and the forward return at standard windows
Price at filing
—
Pre-filing
1mo ago1w ago1d ago
Returns since
7d30d90d180d1y

HKHC price since this filing

30 days of pre-filing context and vertical markers at the filing date plus 7d / 30d / 90d / 180d / 1y afterwards
HKHC since 2026-08-25Filed 10 days ago · 30 days of pre-filing context shaded
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Filing datePost-filing windows (7d, 30d, 90d, 180d, 1y)30 days of pre-filing context

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Buy
Code P
Identifier
0001437749-26-028880
Common Stock
Transaction date
Aug 24, 2026
Filed Aug 25, 2026, 02:11 PM · 1d delay
Shares
2.00k sh
$2.70k per share
Estimated value
$5.40M
Computed from shares × price
Holdings after
4.45k sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
Director Buy Direct Ownership Large Holdings Increase
+36score
Filing-only score

+36

Compact filing score computed from stored Form 4 facts. Version v1.

Strong filing signal

This filing has a high positive filing-only score. It may deserve closer research, but it is not an investment recommendation.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

No officer title

Officer NoDirector Yes10% NoOther No
Footnotes & amended

No footnotes recorded.

Original filing · 0001437749-26-028880
Related transactions

0 other filings

Same reporting owner
Recent company activity

0 recent txs

HKHC