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US INSIDER PROFILE · NON-SCORING RESEARCH
Rosenthal Brent D
Director
Identity: SEC reporting-owner CIK · Reporting-owner CIK: 0001443849
Purchase history
- Companies traded
- 2
- Purchases · 12M
- 6
- Purchases · 24M
- 10
- Average purchase
- $23.0K
- Median purchase
- $19.8K
- Gross purchase value
- $229.8K
Companies: Horizon Kinetics Holding Corp | PITNEY BOWES INC /DE/
10 SEC accession(s) · 0 joint-owner event(s). Values are reported Form 4 transaction values in USD.
Qualifying purchase disclosures
| Published | Company | Ticker | Role | Reported value | SEC source |
|---|---|---|---|---|---|
| 2026-08-25 | Horizon Kinetics Holding Corp | HKHC | Director | $54.0K | Open filing |
| 2026-05-21 | Horizon Kinetics Holding Corp | HKHC | Director | $19.5K | Open filing |
| 2026-03-19 | Horizon Kinetics Holding Corp | HKHC | Director | $24.8K | Open filing |
| 2026-03-17 | PITNEY BOWES INC /DE/ | PBI | Director | $40.9K | Open filing |
| 2025-11-26 | Horizon Kinetics Holding Corp | HKHC | Director | $8.2K | Open filing |
| 2025-11-25 | PITNEY BOWES INC /DE/ | PBI | Director | $20.0K | Open filing |
| 2025-09-05 | PITNEY BOWES INC /DE/ | PBI | Director | $35.9K | Open filing |
| 2025-09-03 | Horizon Kinetics Holding Corp | HKHC | Director | $11.4K | Open filing |
| 2024-11-20 | Horizon Kinetics Holding Corp | HKHC | Director | $3.7K | Open filing |
| 2024-11-15 | Horizon Kinetics Holding Corp | HKHC | Director | $11.4K | Open filing |
Post-purchase outcomes
Excess return = stock return − S&P 500 ETF (SPY adjusted close) return. Returns start on the first shared trading session on or after publication.
| Period | Completed events | Price coverage | Hit rate | Median excess return | Average excess return | Worst excess return |
|---|---|---|---|---|---|---|
| 5D | 7Developing | 70.0% (7/10) | 42.9% (3/7) | -0.6% | +0.2% | -3.6% |
| 20D | 7Developing | 70.0% (7/10) | 28.6% (2/7) | -4.5% | -8.3% | -32.1% |
| 60D | 6Developing | 66.7% (6/9) | 33.3% (2/6) | -6.5% | -9.3% | -33.7% |
| 120D | 5Developing | 62.5% (5/8) | 20.0% (1/5) | -12.7% | -15.6% | -36.5% |
Research patterns
- First purchase in 12M
- 0/8
- Large purchase ≥ $100k
- 0/10
- Cluster buying · 15D
- 7/10
- Buying the dip
- 7/7
Routine / opportunistic: Not classifiable. These labels never affect the score or ranking.
Small samples remain visible but are not scored. This research enrichment never affects US-v1.1.